General Anatomy and Physiology Flashcards
What is the function of the skeletal system?
Provides the basic framework of the body; Protects, shapes, gives support to the body; Source of attachment for muscles; Stores minerals and manufactures blood cells
What is the function of the muscular system?
Muscles contract and relax to allow external body movement and production of the body’s heat; Internal muscles work to move food along the digestive track and keep the heart beating
What is the function of the nervous system?
Provides a communication system for the body; Response to both internal and external stimuli
What is the function of the endocrine system?
Controls growth; Stimulates sexual development; regulates use of calcium; Aids in regulating the body’s water balance; Produces insulin
What is the function of the reproductive system?
Produces new life
What is the function of the circulatory system?
Carries life-sustaining substances, such as nutrients and oxygen, throughout the body; Carries away waste materials; Maintains a balance between intracellular and extracellular fluids
What is the function of the digestive system?
Takes food in, breaks it down, and converts it to substances the body needs to sustain life; Provides a means for the body to eliminate solid wastes
What is the function of the respiratory system?
Brings oxygen into the body that is transported to all cells; The waste product, carbon dioxide, is picked up and exhaled
What is the function of the lymphatic system?
Provides nutrients, drains body fluids, and absorbs fats
What is the function of the immune system?
Protects the body from disease and harmful substances
What is the function of the integumentary system?
Provides body protection; Includes skin, hair, and nails
What is the definition of anterior in describing areas of the body?
In front of; In the front of the body or body section
E.x. The eye is anterior to the ear
What is the definition of ventral in describing areas of the body?
On the front
E.x. The belly or abdominal area of the body is on the ventral side of the body
What is the definition of posterior in describing areas of the body?
In back or behind; In the back of the body or body section
E.x. The ear is posterior to the nose
What is the definition of dorsal in describing areas of the body?
On the back
E.x. The dorsal surface is on the back of the body or organ
What is the definition of medial in describing areas of the body?
Toward the middle of the body; The medial is closest to the midline(Towards the midline)
(E.x. The midline or median line divides the body into left and right halves)
What is the definition of mesial in describing areas of the body?
Toward the midline of the body (primarily used in dentistry)(Away from the midline)
(E.x. The surface of a tooth that faces the median line is the mesial surface)
What is the definition of lateral in describing areas of the body?
Toward the outside or away from the midline that divides the body
(E.x. The ear is on the lateral surface of the head)
What is the definition of distal in describing areas of the body?
Away from the midline of the body or body section(Farther from trunk)
(E.x. The hand is the distal portion of the arm; In dentistry, the surface of a tooth that faces away from the median line is the distal surface)
What is the definition of proximal in describing areas of the body?
Refers to the part of the body closest to the point of attachment(Closer to trunk)
(E.x. The thigh is the proximal surface of the leg)
What is the definition of inferior in describing areas of the body?
Below or under
E.x. The mouth is inferior to the nose
What is the definition of superior in describing areas of the body?
Above or higher
E.x. The eyes are superior to the mouth
What are the 3 planes that the human body can be divided into?
Sagittal, frontal and transverse
What terms are used to describe areas of the body on the sagittal plane?
Proximal, distal, medial and lateral
What is proximal also known as?
Central
What is distal also known as?
Peripheral
What terms are used to describe areas of the body on the frontal plane?
Anterior and posterior
What is anterior also known as?
Ventral
What is posterior also known as?
Dorsal
What is the frontal plane also known as?
The coronal plane
What terms are used to describe areas of the body on the transverse plane?
Superior and inferior
What is superior also known as?
Cranial
What is posterior also known as?
Caudal
What is the transverse plane also known as?
The horizontal plane
What are the 2 body cavities?
Dorsal and Ventral
What canals are in the dorsal cavity?
Spinal and cranial
What canals are in the ventral cavity?
Thoracic, abdominal and pelvic
What is bone or osseous tissue composed of?
Connective tissue
Connective is rendered hard by deposits of _______ _____.
Mineral salts
What type of bone is found in the middle and end of long bones?
Cancellous/Spongy Bone
What type of bone is found in the main shaft and outer layer of bones?
Compact/Dense Bone
What type of bone consists a meshwork of interconnecting bone?
Cancellous Bone
A meshwork of interconnecting bone is called __________.
Trabeculae
What type of bone is the strong and hard section of the bone?
Compact Bone
What cells are in compact bones?
Osteoclast cells
Compact bone is covered with a layer of tough, fibrous tissue called the _________.
Periosteum
What does the periosteum contain?
Blood & lymph vessels, osteoblasts, and nerve tissue
What are bone-building cells known as?
Osteoblasts
What is found where bones join and forms part of some structures?(E.x. Nose, ears)
Cartilage
An area where two or more bones meet at a junction is known as a _____/____________.
Joint/Articulation
What is a joint usually composed of?
Fibrous connective tissue and cartilage
What type of joint has fibrous connective tissue and is immovable/fixed? Example?
Fibrous joint, bones of cranium
What type of joint has connective tissue and cartilage, and is slightly movable? Example?
Cartilaginous joint, joints of bones of vertebrate
What type of joint has fluid within a joint, and considerable/free movement?
Synovial joint
What are the six types of synovial joints?
Ball and socket, hinge, pivot, gliding, saddle, and condyloid
Importance of the skeletal system to a dental assistant(3)
Cranium and facial bones, maxilla and mandible support teeth and are primary focus in dentistry
Conditions of skeletal system may alter dental treatment
Knowing this system aids dental assistants in correct patient positioning and movement at the dental unit, as well as providing sound ergonomic principles for themselves
What is osteomyelitis and what are some signs/symptoms?
An infection of bone-forming tissue; There’s inflammation, edema, and circulatory congestion in bone marrow; Pus may form, inflammatory pressure may cause small fractures
What is osteoporosis?
The loss of bony material, thus leaving bones brittle and soft
What is cleft palate?
The failure of a palate to form and join correctly
What is a fracture?
A break of the bone or cartilage
What does TMJ represent and what is it?
Temporomandibular Joint Disease; Degeneration/disease of the joint where the mandible articulates with the temporal bone
What percent of the body weight does the muscular system make up?
30 to 40 percent
How do muscles provide movement?
By contracting and relaxing
What do internal muscles do?
Move food along the digestive track and keep the heart beating
What do the external muscles do?
Allow the body to walk, run, stand, straight, and communicate
Muscles also produce ____ ____.
Body heat
What are the three types of muscle tissues?
Striated, cardiac, and smooth
Which muscle type has the largest amount of muscle tissue?
Striated muscle
Striated muscle is made of ____, ____ cells that have _______ or _____ across them
Long, thin, stripes, bands
What is the function of striated muscle?
Provide for external body movement, from facial expression to bike riding
What is striated muscle sometimes called? Why?
Voluntary muscles, Only group of muscles an individual has conscious control over
Cardiac muscle has the ____ ________ or _______ appearance as ________ muscle but is ___________ __ ______.
Same striated, striped, skeletal, involuntary in action
Smooth muscle is ___________ tissue
Nonstriated
Is smooth muscle involuntary or voluntary?
Involuntary
What are involuntary muscles controlled by?
The autonomic nervous system
Where are smooth muscles found?
Internal organs, blood vessels, skin, and ducts from glands
Where is cardiac muscle found?
Only in the heart
Which internal organ are smooth muscles not found?
The heart
What are groups of muscle cells often called?
Fibers
Define fascia
Fibrous sheets of connective tissue that covers, supports, and separates the muscle fibers;
What do each fibers have besides muscle cells?
Nerves and a blood supply
What is the muscle tissue capacity to respond to stimuli called?
Excitability or irritability
Skeletal muscles may attach directly to the __________ of the bone or they may attach through ___________ __________ ______ that extends beyond the muscle
Periosteum, specialized connective tissue
Define tendon
Attachment extension in the form of a cord (attach muscle to bone)
Define aponeurosis
Attachment extension that is broad and flattened
Define ligaments
Connective tissue that is composed of bands or sheets fibrous tissue and act to connect of support two or more bones
Define origin of the muscle
Where the muscle attaches to the more stationary bone
Define insertion point
Where the bone is moveable
What is the function of muscles?
Muscles contract and relax to provide movement
How do most skeletal muscles function?
Antagonistic pairs, while one set of muscles contract another corresponding set relaxes
What muscles are used when the dental assistant assists the dentist or works directly on patients?
Muscles of the lower back and neck
What specific muscular activities make muscular system pertinent to dentistry?
Chewing, swallowing, facial expressions, and talking
The muscle tissue can be s_______, sp______, c______, or i_______
Strained, sprained, cramped, or inflamed
What is a sudden, involuntary muscle contraction known as?
Spasm
What is muscle deterioration known as?
Muscle atrophy
Identify: A chronic pain in the muscles and soft tissues surrounding the joints
Fibromyalgia