Chapter 1 - The Human Body Flashcards
Into to the human body systems and functions
Abdominopelvic cavity
space between the diaphragm and pelvic region - stomach, gallbladder, liver, kidneys, pancreas, spleen, small and large intestines, ovaries & uterus
spleen
located in upper left part of abdominal cavity, beside the upper portion of the stomach - it acts primarily as a blood filter
gallbladder
the pear-shaped, hollow organlies beneath the liver; where bile is stored and concentrated before it is released into the small intestine
liver
large, meaty organ that sits on the right side of the belly; has many functions, including making proteins and blood clotting factors, manufacturing triglycerides and cholesterol, glycogen synthesis, and bile production
pancreas
upper abdomen, approx. 6” long and is located behind the stomach; makes enzymes that aid in digestion & hormones (ie insulin)
anatomy
study of structure (or morphology) of the body and how the parts are organized
anterior
toward the front
cardiovascular system
aka circulatory - heart, arteries, veins, capillaries and blood
cardiovascular sys. Functions
pump & distribute blood which carries oxygen & nutrients & wastes to and from cells
caudal
towards the tail, only in embryonic state (so lowermost or below)
cephalad
pertaining to the head
coronal
plane - dividing body into front & back portions
cranial
pertaining to the head (the bony portion of the skull that holds the brain)
cranial cavity
is within the dorsal cavity - contains the brain
digestive system
alimentary canal (mouth, pharynx, esophagus, stomach, small & large intestines, rectum & anus - as well associated glands: salivary, liver, gallbladder and pancreas)
digestive sys. Functions
convert food into simpler substances, that along with nutrients, can be absorbed and to eliminate indigestible wastes
distal
away from the point of attachment (wrist is to elbow)
dorsal
pertaining to the back - contains cranial cavity (brain) and spinal cavity (spinal cord) - aka nervous system organs
endocrine system
ductless glands; hypothalamus, pituitary, and pineal glands are your brain. The thyroid & parathyroid - neck. The thymus between lungs, the adrenals on top of kidneys, and the pancreas is behind your stomach.
endocrine sys. Functions
production of hormones that chemically regulate body functions
frontal
plane - dividing body into front & back portions
homeostasis
maintaining narrow limits of the bodies internal environments (ie: blood glucose and insulin levels)
horizontal
plane - dividing body into upper & lower portions
inferior
lowermost or below
integumentary system
2 layers - epidermis & dermis; includes skin, hair, nails, sweat & sebaceous glands
integumentary sys. Functions
insulation, protection from environmental hazards (UV rays), regulation of body temp. & water, receptor sites detect change in temp. or pressure
lateral
towards the side or away from midline
lymphatic system
aka immune - lymph nodes & vessels, thymus gland, and spleen, tonsils, and appendix
lymphatic sys. Functions
protects from disease (antibodies), fat absorption from intestines and carry to blood, drains tissue spaces of excess interstitial fluids
appendix
finger shaped, located in the lower right part of your abdomen (attached to large intestine)
medial
midline of the body
mediastinum
space between the lungs between sternum to vertebral column - heart, thymus gland, trachea, esophagus, lymph vessels, blood vessels & nerves
sternum
aka breastbone - long flat bone located in the center of the chest - connects to the ribs via cartilage and forms the front of the rib cage, thus helping to protect the heart, lungs, and major blood vessels from injury
lymph node
each of a number of small swellings in the lymphatic system where lymph (a colorless fluid) is filtered and lymphocytes are formed
trachea
aka windpipe - extends from the larynx and branches into the two primary bronchi
larynx
aka voice box - approx. 2” long in adults & sits above the windpipe (trachea) in the neck and in front of the food pipe (pharynx)
pharynx
aka food pipe or throat - part of both digestive and respiratory systems
thymus gland
behind your sternum and between your lungs - serves a vital role in the training and development of T-lymphocytes or T cells, a type of white blood cell
midsagittal
plane - vertically divides the body into halves
muscular system
muscles, fascia, tendon sheaths & bursae
muscular sys. Functions
skeletal muscles (striated, voluntary - moves bones), smooth muscles (aka visceral, involuntary - move internal organs, blood vessels, secretory ducts), cardia muscles (striated, involuntary - keep heart pumping)
fascia
a sheet of fibrous connective tissue that is present throughout the entire body
nervous system
brain, spinal cord, cranial and peripheral nerves, sensory and motor structures
nervous sys. Functions
controlling, correlating and regulating other body systems, interpreting stimuli from outside world, controlling senses
parietal
relating to the walls of a cavity
pathology
study of diseases of the body
pericardial cavity
contains the heart - one of 2 subcategories of the thoracic cavity (which is a subcategory of the ventral cavity)
physiology
study of bodily functions; what they do and how they do it
pleural cavities
a fluid filled space which folds back onto itself to form a two-layered membranous sac surrounding the lungs
posterior
toward the back
protoplasm
liquid part of a cell, contained within a membrane that is a colloidal solution (contains proteins, lipids, carbs, and inorganic salts) organized into organelles
proximal
nearing the point of attachment (elbow proximal to wrist)
reproductive system - Female
ovaries, uterine tubes, uterus, vagina, external genitalia, and mammary glands
reproductive system - Male
testes, epididymis, vas deferens, ejaculatory ducts, seminal vesicles, prostate & bulbourethral glands, urethra & penis
epididymis
sits on top of the testes, a tube from testes to vas deferens - sperm is stored here
vas deferens
these ducts transport sperm from the epididymis to the ejaculatory ducts (think vasectomy)
ejaculatory ducts
on each side of the prostate gland is anejaculatory duct, 2cm in length and is created when the seminal vesicle’s duct merges with the vas deferens
seminal vesicle
a pair of simple tubular glands, located at the base of the bladder, secrete a thick fluid that nourishes the sperm
bulbourethral glands
aka Cowper’s glands; are a pair of pea shaped exocrineglands beneath the prostate gland; contributes to the final volume of semen by producing a lubricating mucus secretion
prostate gland
a gland surrounding the neck of the bladder, the urethra runs through the center and releases prostatic fluid that nourishes and protects sperm
respiratory system
nasal cavities, pharynx, larynx, trachea, bronchi & lungs
respiratory sys. Functions
brings oxygen to the blood and carries carbon dioxide from the blood to expel from the body
sagittal
plane - vertically dividing the body into 2 unequal portions
skeletal system
bones, joints, cartilage and membranous structures associated with bones
skeletal sys. Functions
protection (soft vital organs), support (for tissues), act as levers for movement, storage (mineral salts like calcium & phosphorous, as well as fat in yellow marrow), mfg. blood cells in red marrow
reproductive sys. Functions
maintenance of sexual characteristics and procreation
spinal cavity
contains the spinal cord - is a sub cavity of the dorsal cavity
superior
uppermost or above
thoracic cavity
contains the heart and lungs - is a sub cavity of the ventral cavity
transverse
plane - dividing body into upper & lower portions
urinary system
2 kidneys, 2 ureters, urinary bladder and urethra
urinary sys. Function
maintenance of homeostasis, formation & elimination of urine, chemical regulation of blood
kidney
a pair of bean-shaped organs on either side of yourspine - filters blood; remove wastes, control the body’s fluid and electrolytes balanced. All of the blood in your body passes through them several times a day
ventral
toward the front
viscera
referring to any organs of any cavity (mostly within the abdomen)
visceral
pertaining to the covering on an organ
body planes
3 ways to divide the body by drawing a line all the way through
body cavities
2 main cavities - dorsal and ventral - can be further divided: Dorsal (cranial & spinal); Ventral (Thoracic (Pericardial & pleural) and Abdominopelvic)
atom
smallest units of elements
molecule
atoms combine through chemical bonds
cell
smallest living unit of biologic organization; performs activities of life
tissue
made up of similar cells that perform similar functions - 4 main categories (epithelial, muscle, nervous, and connective)
organ
groups of tissues
system
groups of organs (11 of them)
human organism
all the organ systems to make a functioning human being