Unit 7 - Muscular Anatomy

skeletal, smooth, cardiac

what are the 3 types of muscle tissue?

smooth

this muscle type has no striations, is involuntary, and makes up the walls of hollow organs

peristalsis

slow and sustained muscle contractions

cardiac

this muscle type is striated, involuntary, and found only in the heart

intercalated disks

what does cardiac muscle have that makes it unique?

skeletal

this type of muscle is attached to bones, multinucleate, striated, and voluntary

endomysium

what each skeletal muscle fiber is covered by

fascicles

bundles of fibers

perimysium

what fascicles are wrapped in

epimysium

what many fascicles are bound by

tendons

cords of epimysia tissues

aponeuroses

sheets of epimysium

moves bone, maintains posture, stabilitzes joints, generates heat

what are the skeletal muscle functions?

origin

immovable end of the muscle

insertion

movable end of the muscle (pulled toward origin)

prime mover

muscle with main ability to move a limb

synergist

muscle(s) that assist the prime mover

antagonist

muscle(s) that resists the prime mover

extension

increasing the angle of the joint

hyperextension

over extension (past 180)

flexion

curl up

supination

rotate out

pronation

rotate in

circumduction

movement in a circular motion

rotation

rotation in general

inversion

feet turned in

eversion

feet turned out

adduction

move limb toward midline

abduction

move limb away from body

frontalis

raises eyebrows (#11)