Chapter 5 Flashcards
abdomen
The body cavity that contains the major organs of digestion and excretion. It is located below the diaphragm and above the pelvis.
abduction
Motion of a limb away from the midline
acetabulum
The depression on the lateral pelvis where its three component bones join, in which the femoral head fits snugly
Adam’s apple
The firm prominence in the upper part of the larynx formed by the thyroid cartilage. It is more prominent in men than in women.
adduction
Motion of a limb toward the midline
adenosine triphosphate (ATP)
The nucleotide involved in energy metabolism; used to store energy
adrenal glands
Endocrine glands located on top of the kidneys that release adrenaline when stimulated by the sympathetic nervous system
adrenergic
Pertaining to nerves that release the neurotransmitter norepinephrine, or noradrenaline (such as adrenergic nerves, adrenergic response). The term also pertains to the receptors acted on by norepinephrine, that is the adrenergic receptors.
aerobic metabolism
Metabolism that can proceed only in the presence of oxygen
agonal gasps
Slow, gasping breaths, sometimes seen in dying patients
alpha-adrenergic receptors
Portions of the nervous system that when stimulated can cause constriction of blood vessels
alveoli
The air sacs of the lung in which the exchange of oxygen and carbon dioxide takes place
anaerobic metabolism
The metabolism that takes place in the absence of oxygen; the principal product is lactic acid
anatomic position
The position of reference in which the patient stands facing you, arms at the side, with the palms of the hands forward
anterior
The front surface of the body; the side facing you in the standard anatomic position
aorta
The principal artery leaving the left side of the heart and carrying freshly oxygenated blood to the body
apex (plural apices)
The pointed extremity of a conical structure
apneustic center
Portion of the pons that increases the length of inspiration and decreases the respiratory rate
appendicular skeleton
The portion of the skeletal system that comprises the arms, legs, pelvis, and shoulder girdle
appendix
A small tubular structure that is attached to the lower border of the cecum in the lower right quadrant of the abdomen
arterioles
The smallest branches of arteries leading to the vast network of capillaries
atrium
One of the two upper chambers of the heart
autonomic nervous system
The part of the nervous system that regulates functions, such as digestion and sweating, that are not controlled voluntarily
axial skeleton
The part of the skeleton comprising the skull, spinal column, and rib cage
ball-and-socket joint
A joint that allows internal and external rotation, as well as bending
beta-adrenergic receptors
Portions of the nervous system that when stimulated can cause an increase in the force of contraction of the heart, an increased heart rate, and bronchial dilation
biceps
The large muscle that covers the front of the humerus
bilateral
In anatomy, a body part that appears on both sides of the midline
bile ducts
The ducts that convey bile between the liver and the intestine
blood pressure (BP)
The pressure that the blood exerts against the walls of the arteries as it passes through them
brachial artery
The major vessel in the upper extremity that supplies blood to the arm
brain
The controlling organ of the body and center of consciousness; functions include perception, control of reactions to the environment, emotional responses, and judgement
brain stem
The area of the brain between the spinal cord and cerebrum, surrounded by the cerebellum; controls functions that are necessary for life, such as respiration
capillary vessels
The tiny blood vessels between the arterioles and venules that permit transfer of oxygen, carbon dioxide, nutrients, and waste between body tissues and the blood
cardiac muscle
The heart muscle
carotid artery
The major artery that supplies blood to the head and brain
cartilage
The support structure of the skeletal system that provides cushioning between bones; also forms the nasal septum and portions of the outer ear
cecum
The first part of the large intestine, into which the ileum opens
central nervous system (CNS)
The brain and spinal cord
cerebellum
One of the three major subdivisions of the brain, sometimes called the “little brain”; coordinates the various activities of the brain, particularly fine body movements
cerebrospinal fluid (CSF)
Fluid produced in the ventricles of the brain that flows in the subarachnoid space and bathes the mininges
cerebrum
The largest part of the three subdivisions of the brain, sometimes called the “gray matter”; made up of several lobes that control movement, hearing, balance, speech, visual perception, emotions, and personality
cervical spine
The portion of the spinal column consisting of the first seven vertebrae that lie in the neck
chordae tendineae
Thin brands of fibrous tissue that attach to the valves in the heart and prevent them from inverting
chyme
The name of the substance that leaves the stomach. It is a combination of all of the eaten foods with added stomach acids.
circulatory system
The complex arrangement of connected tubes, including the arteries, arterioles, capillaries, venules, and veins, that moves blood, oxygen, nutrients, carbon dioxide, and cellular waste throughout the body
clavicle
The collarbone; it is lateral to the sternum and anterior to the scapula
coccyx
The last three or four vertebrae of the spine; the tailbone
coronal plane
An imaginary plane where the body is cut into front and back parts
cranium
The area of the head above the ears and eyes; the skull. The cranium contains the brain.
cricoid cartilage
A firm ridge of cartilage that forms the lower part of the larynx
cricothyroid membrane
A thin sheet of fascia that connects the thyroid and cricoid cartilages that make up the larynx
dead space
Any portion of the airway that does contain air and cannot participate in gas exchange, such as the trachea and bronchi
deep
Further inside the body and away from the skin
dermis
The inner layer of the skin, containing hair follicles, sweat glands, nerve endings, and blood vessels
diaphragm
A muscular dome that forms the undersurface of the thorax, separating the chest from the abdominal cavity. Contraction of the diaphragm (and the chest wall muscles) brings air into the lungs. Relaxation allows air to be expelled from the lungs.
diastole
The relaxation, or period of relaxation, of the heart, especially of the ventricles
diffusion
Movement of a gas from an area of higher concentration to an area of lower concentration
digestion
The processing of food that nourishes the individual cells of the body
distal
Farther from the trunk or nearer to the free end of the extremity
dorsal
The posterior surface of the body, including the back of the hand
dorsalis pedis artery
The artery on the anterior surface of the foot between the first and second metatarsals
dorsal respiratory group (DRG)
A portion of the medulla oblongata where the primary respiratory pacemaker is found
endocrine system
The complex message and control system that integrates many body functions, including the release of hormones
enzymes
Substances catalysts designed to speed up the rate of specific biochemical reactions
epidermis
The outer layer of skin, which is made up of cells that are sealed together to form a watertight protective covering for the body
epiglottis
A thin, leaf-shaped valve that allows air to pass into the trachea but prevents food and liquid from entering
epinephrine
A hormone produced by the adrenal medulla that has a vital role in the function of the sympathetic nervous system
esophagus
A collapsible tube that extends from the pharynx to the stomach; contractions of the muscle in the wall of the esophagus propel food and liquids through it to the stomach
expiratory reserve volume
The amount of air that can be exhaled following a normal exhalation; average volume is about 1,200 mL
extend
To straighten
extension
The straightening of a joint
fallopian tubes
Long, slender tubes that extend from the uterus to the region of the ovary on the same side and through which the ovum passes from the ovary to the uterus
femoral artery
The principal artery of the thigh, a continuation of the external iliac artery. It supplies blood to the lower abdominal wall, external genitalia, and legs. It can be palpated in the groin area.
femoral head
The proximal end of the femur, articulating with the acetabulum to form the hip joint
femur
The thighbone; the longest and one of the strongest bones in the body
flex
To bend
flexion
The bending of a joint
foramen magnum
A large opening at the base of the skull through which the brain connects to the spinal cord
gallbladder
A sac on the undersurface of the liver that collects bile from the liver and discharges it into the duodenum through the common bile duct
genital system
The reproductive system in males and females
germinal layer
The deepest layer of the epidermis where new skin cells are formed
greater trochanter
A bony prominence on the proximal lateral side of the thigh, just below the hip joint
hair follicles
The small organs that produce hair
heart
A hollow muscular organ that pumps blood through out the body
heart rate
The number of heartbeats during a specific time
Hering-Breuer reflex
A protective mechanism that terminates inhalation, thus preventing overexpansion of the lungs
hinge joints
Joints that can bend and straighten but cannot rotate; they restrict motion to one plane
hormones
Substances formed in specialized organs or glands and carried to another organ or group of cells in the same organism. Hormones regulate many body functions, including metabolism, growth, and body temperature
humerus
The supporting bone of the upper arm
hydrostatic pressure
The pressure of water against the walls of its container
hypoxic drive
A “backup system” to control respiration; senses drops in the oxygen level in the blood
ilium
One of three bones that fuse to form the pelvic ring
inferior
Below a body part or nearer to the feet
inferior vena cava
One of the two largest veins in the body; carries blood from the lower extremities and the pelvic and abdominal organs to the heart
inspiratory reserve volume
The amount of air that can be inhaled after a normal inhalation; the amount of air that can be inhaled in addition to the normal tidal volume
interstitial space
The space in between the cells
involuntary muscle
The muscle over which a person has no conscious control. It is found in many automatic regulating systems of the body.
ischium
One of three bones that fuse to form the pelvic ring
joint (articulation)
The place where two bones come into contact
joint capsule
The fibrous sac that encloses a joint
kidneys
Two retroperitoneal organs that excrete the end products of metabolism as urine and regulate the body’s salt and water content
labored breathing
The use of muscles of the chest, back, and abdomen to assist in expanding the chest; occurs when air movement is impaired
lactic acid
A metabolic end product of the breakdown of glucose that accumulates when metabolism proceeds in the absence of oxygen
large intestine
The portion of the digestive tube that encircles the abdomen around the small bowel, consisting of the cecum, the colon, and the rectum. It helps regulate water balance and eliminate solid waste.
lateral
In anatomy, parts of the body that lie farther from the midline. Also called outer structures.
lesser trochanter
The projection on the medial/superior portion of the femur
ligament
A band of fibrous tissue that connects bone to bones. It supports and strengthens a joint.
liver
A large solid organ that lies in the right upper quadrant immediately below the diaphragm; it produces bile, stores glucose for immediate use by the body, and produces many substances that help regulate immune responses.
lumbar spine
The lower part of the back, formed by the lowest five nonfused vertebrae; also called the dorsal spine
mandible
The bone of the lower jaw
manubrium
The upper quarter of the sternum
maxillae
The upper jawbones that assist in the formation of the orbit, the nasal cavity, and the palate and hold the upper teeth
medial
Parts of the body that lie closer to the midline; also called inner structures
medulla oblongata
Nerve tissue that is continuous inferiorly with the spinal cord; serves as a conduction pathway for ascending and descending nerve tracts; coordinates heart rate, blood vessel diameter, breathing, swallowing, vomiting, coughing, and sneezing
midbrain
The part of the brain that is responsible for helping to regulate the level of consciousness
midsagittal plane (midline)
An imaginary vertical line drawn from the middle of the forehead through the nose and the umbilicus (navel) to the floor
minute volume
The amount of air that moves in and out of the lungs per minute minus the dead space. Also called minute ventilation.
motor nerves
Nerves that carry information from the central nervous system to the muscles of the body
mucous membranes
The lining the body cavities and passages that communicate directly or indirectly with the environment outside the body
mucus
The opaque, sticky secretion of the mucous membranes that lubricates the body openings
musculoskeletal system
The bones and voluntary muscles of the body
myocardium
The heart muscle
nasopharynx
The part of the pharynx that lies above the level of the roof of the mouth, or palate
nervous system
The system that controls virtually all activities of the body, both voluntary and involuntary
norepinephrine
A neurotransmitter and drug sometimes used in the treatment of shock; produces vasoconstriction through its alpha-stimulator properties
occiput
The most posterior portion of the cranium
oncotic pressure
The pressure of water to move, typically into the capillary, as the result of the presence of plasma proteins
orbit
The eye socket, made up of the maxilla and zygoma
oropharynx
A tubular structure that extends vertically from the back of the mouth to the esophagus and trachea
ovaries
Female glands that produce sex hormones and ova (eggs)
palmar
The forward facing part of the hand in the anatomic position
pancreas
A flat, solid organ that lies below the liver and stomach; it is a major source of digestive enzymes and produces the hormone insulin
parasympathetic nervous system
A subdivision of the autonomic nervous system, involved in control of involuntary vegetative functions, mediated largely by the vagus nerve through the chemical actetylcholine
parietal regions
The areas between the temporal and occipital regions of the cranium
patella
The kneecap; a specialized bone that lies within the tendon of the quadriceps muscle
pathophysiology
The study of how normal physiologic processes are affected by disease
perfusion
The circulation of oxygenated blood within an organ or tissue in adequate amounts to meet the cells’ current needs
peripheral nervous system
The part of the nervous system that consists of 31 pairs of spinal nerves and 12 pairs of cranial nerves. These peripheral nerves may be sensory nerves, motor nerves, or connecting nerves.
peristalsis
The wavelike contraction of smooth muscle by which the ureters or other tubular organs propel their contents
plantar
The bottom surface of the foot
plasma
A sticky, yellow fluid that carries the blood cells and nutrients and transports cellular waste material to the organs of excretion
platelets
Tiny, disk-shaped elements that are much smaller than the cells; they are essential in the initial formation of a blood clot, the mechanism that stops bleeding
pleura
The serous membranes covering the lungs and lining the thoracic cavity, completely enclosing a potential space known as the pleural space
pleural space
The potential space between the parietal pleura and the visceral pleura. It is described as “potential” because under normal conditions, the space does not exist.
pneumotaxic (pontine) center
A portion of the pons that assists in creating shorter, faster respirations
pons
An organ that lies below the midbrain and above the medulla and contains numerous important nerve fibers, including those for sleep, respiration, and the medullary respiratory center
posterior
In anatomy, the back surface of the body; the side away from you in the standard anatomic position
posterior tibial artery
The artery just behind the medial malleolus; supplies blood to the foot
prostate gland
A small gland that surrounds the male urethra where it emerges from the urinary bladder; it secretes a fluid that is part of the ejaculatory fluid
proximal
Closer to the trunk
pubic symphysis
A hard bony and cartilaginous prominence found at the midline in the lowermost portion of the abdomen where the two halves of the pelvic ring are joined by cartilage at a joint with minimal motion
pubis
One of three bones that fuse to form the pelvic ring
pulmonary artery
The major artery leading from the right ventricle of the heart to the lungs; it carries oxygen-poor blood
pulmonary circulation
The flow of blood from the right ventricle through the pulmonary arteries and all of their branches and capillaries in the lungs and back to the left atrium through the venules and pulmonary veins; also called the lesser circulation
pulmonary veins
The four veins that return oxygenated blood from the lungs to the left atrium of the heart
pulse
The wave of pressure created as the heart contracts and forces blood out the left ventricle and into the major arteries
quadrants
The way to describe the sections of the abdominal cavity. Imagine two lines intersecting at the umbilicus dividing the abdomen into four equal areas.
radial artery
The major artery in the forearm; it is palpable at the wrist on the thumb side
radius
The bone on the thumb side of the forearm
rectum
The lowermost end of the colon
red blood cells
Cells that carry oxygen to the body’s tissues; also called erythrocytes
renal pelvis
A cone-shaped collecting area that connects the ureter and the kidney
residual volume
The air that remains in the lungs after maximal expiration
respiration
The inhaling and exhaling of air; the physiologic process that exchanges carbon dioxide from fresh air
respiratory system
All the structures of the body that contribute to the process of breathing, consisting of the upper and lower airways and their component parts
reticular activating system
All of the structures of the body that contribute to the process of breathing, consisting of the upper and lower airways and their component parts
retroperitoneal
Behind the abdominal cavity
sacroiliac joint
The connection point between the pelvis and the vertebral column
sacrum
One of three bones (sacrum and two pelvic bones) that make up the pelvic ring; consists of five fused sacral vertebrae
sagittal (lateral) plane
An imaginary line where the body is cut into left and right parts
salivary glands
The glands that produce saliva to keep the mouth and pharynx moist
scalp
The thick skin covering the cranium, which usually bears hair
scapula
The shoulder blade
sebaceous glands
Glands that produce an oily substance called sebum, which discharges along the shafts of the hairs
semen
Seminal fluid ejaculated from the penis and containing sperm
seminal vesicles
Storage sacs for sperm and seminal fluid, which empty into the urethra at the prostate
sensory nerves
The nerves that carry sensations of touch, taste, heat, cold, pain, and other modalities from the body to the central nervous system
shock
An abnormal state associated with inadequate oxygen and nutrient delivery to the metabolic apparatus of the cell
shoulder girdle
The proximal portion of the upper extremity, made up of the clavicle, the scapula, and the humerus
skeletal muscle
Muscle that is attached to bones and usually crosses at least one joint; striated, or voluntary, muscle
skeleton
The framework that gives the body its recognizable form; also designated to allow motion of the body and protection of vital organs
small intestine
The portion of the digestive tube between the stomach and the cecum, consisting of the duodenum, jejunum, and ileum
smooth muscle
Involuntary muscle; it constitutes the bulk of the gastrointestinal tract and is present in nearly every organ to regulate automatic activity
somatic nervous system
The part of the nervous system that regulates activities over which there is voluntary control
sphincters
Muscles arranged in circles that are able to decrease the diameter of tubes. Examples are found within the rectum, bladder, and blood vessels.
sphygmomanometer
A device used to measure blood pressure
spinal cord
An extension of the brain, composed of virtually all the nerves carrying messages between the brain and the rest of the body. It lies inside of and is protected by the spinal canal.
sternum
The breastbone
stratum corneal layer
The outermost or dead layer of the skin
stroke volume (SV)
The volume of blood pumped forward with each ventricular contraction
subcutaneous tissue
Tissue, largely fat, that lies directly under the dermis and serves as an insulator of the body
superficial
Close to or on the skin
superior
Above a body part or nearer to the head
superior vena cava
One of the two largest veins in the body; carries blood from the upper extremities, head, neck, and chest into the heart
sweat glands
The glands that secrete sweat, located in the dermal layer of the skin
symphysis
A type of joint that has grown together forming a very stable connection
synovial fluid
The small amount of liquid within a joint used as lubrication
synovial membrane
The lining of a joint that secretes synovial fluid into the joint space
systemic circulation
The portion of the circulatory system outside of the heart and lungs
systemic vascular resistance (SVR)
The resistance that blood must overcome to be able to move within the blood vessels. SVR is related to the amount of dilation or constriction in the blood vessel.
systole
The contraction, or period of contraction, of the heart, especially that of the ventricles
temporal regions
The lateral portions on each side of the cranium
tendons
The fibrous connective tissue that attaches muscle to bone
testicle
A male genital gland that contains specialized cells that produce hormones and sperm
thoracic cage
The chest or rib cage
thoracic cavity
The chest cavity that contains the heart, lungs, esophagus, and great vessels
thoracic spine
The 12 vertebrae that lie between the cervical vertebrae and the lumbar vertebrae. One pair of ribs is attached to each of the thoracic vertebrae.
thorax
The chest cavity that contains the heart, lungs, esophagus, and great vessels
thyroid cartilage
A firm prominence of cartilage that forms the upper part of the larynx; the Adam’s apple
tibia
The shin bone, the larger of the two bones of the lower leg
tidal volume
The amount of air moved in and out of the lungs in one relaxed breath; about 500 mL for an adult
topographic anatomy
The superficial landmarks of the body that serve as guides to the structures that lie beneath them
torso
The trunk without the head and limbs
trachea
The windpipe; the main trunk for air passing to and from the lungs
transverse (axial) plane
An imaginary line where the body is cut into top and bottom parts
triceps
The muscle in the back of the upper arm
tunica media
The middle and thickest layer of tissue of a blood vessel wall, composed of elastic tissue and smooth muscle cells that allow the vessel to expand or contract in response to changes in blood pressure and tissue demand
ulna
The inner bone of the forearm, on the side opposite the thumb
ureter
A small, hollow tube that carries urine from the kidneys to the bladder
urethra
The canal that conveys urine from the bladder to outside the body
urinary bladder
A sac behind the pubic symphysis made of smooth muscle that collects and stores urine
urinary system
The organs that control the discharge of certain waste materials filtered from the blood and excreted as urine
vagina
A muscular distensible tube that connects the uterus with the vulva (the external female genitalia); also called the birth canal
vasa deferentia
The spermatic duct of the testicles; also called vas deferens
ventilation
The movement of air between the lungs and the environment
ventral
The anterior surface of the body
ventral respiratory group (VRG)
A portion of the medulla oblongata that is responsible for modulating breathing during speech
ventricle
One of two lower chambers of the heart
vertebrae
The 33 bones that make up the spinal column
voluntary muscle
Muscle that is under direct voluntary control of the brain and can be contracted or relaxed at will; skeletal, or striated, muscle
V/Q ratio
A measurement that examines how much gas is being moved effectively and how much blood is gaining access to the alveoli
white blood cells
Blood cells that have a role in the body’s immune defense mechanisms against infection; also called leukocytes
xiphoid process
The narrow, cartilaginous lower tip of the sternum
zygomas
The quadrangular bones of the cheek, articulating with the frontal bone, the maxillae, the zygomatic processes of the temporal bone, and the great wings of the sphenoid bone
