Chapter 18: The musculoskeletal system
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around the eye
around the mouth
angle of the jaw (helps with chewing)
cheek musclen (helps w whistling)
above biceps (shoulder muscle)
to the side of the leg (where the nurse gives the children their shots).
- Cervical (first 7: 1st is axis 2nd is atlas)
- Thoracic (12)
- lumbar (5)
First 7 pair of ribs:
Last 5 pair of ribs:
False ribs (bc they don't connect directly to sternum)
Last 2 pair of ribs :
functions of the skeleton include:
giving shape to the body and providing mobility.
functions of muscles:
- body movement
- body circulation
- heat production
- the middle layer of the heart (myocardium)
- lightly striated
skeletal (voluntary) and cardiac muscles (involuntary)
smooth muscles (involuntary)
- enable walking
- and other movements
- maintain body in upright position
- participate in body balance
Involuntary muscle action:
- maintain heartbeat to pump blood
- participate in reflexes
- responsible for propelling through the urinary tract
- moving food along the digestive tract
- dilating the pupils of the eyes
covers each muscle.
part of the muscles that attaches to the bone that undergoes the greatest movement.
main part of the muscle
fibrous muscle tissue that covers the bone
attach muscle to bone
located between the ribs ( when they contract the thoracic cavity enlarges)
do not increase the length of a muscle but do increasse muscle tension
shorten and thicken the muscle causing movement.
Range of motion
the total amount of motion that a joint is capable of.
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