Chapter 18: The musculoskeletal system

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)

true ribs

False ribs (bc they don't connect directly to sternum)

floating ribs

giving shape to the body and providing mobility.

• 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
• standing
• sitting
• and other movements
• maintain body in upright position
• participate in body balance

• 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.

the total amount of motion that a joint is capable of.