Muscular system notes, Anatomy Exam I
Muscle O, I, A, N's, Muscle Anatomy, Muscular System
Muscular system - ANS-Collection of muscles whose primary
... [Show More] function is movement
Muscle - ANS-An organ that can relax, contract, and provide the force to move
There are more than _____ muscles in your body - ANS-600
Voluntary muscles - ANS-Muscles you can move
Involuntary muscles - ANS-Muscles you cannot move
Skeletal muscle - ANS-Is attached to and moves bones
Skeletal muscle is______________. - ANS-Voluntary muscles
_______________ and tire more easily - ANS-Contract quickly
Look striped, or ________. - ANS-Striated
Smooth muscle- founded in ________________. - ANS-Internal organs
Smooth muscles are_________. - ANS-Involuntary muscle
Contract and relax ______. - ANS-Slowly
Cardiac muscle-______________ around body. - ANS-Pumps blood
Found only in the________. - ANS-Heart
Cardiac muscle is_________. - ANS-Involuntary muscle
Cardiac muscle is striated, like_________ muscle. - ANS-Skeletal
Tendons-thick bands of connective tissue that ____. - ANS-Connect skeletal muscle to bones
Muscle____- they always____ to move body parts. - ANS-Contract, pull
When the muscle contract, they get shorter and _____________ attached to the bone. - ANS-Pull on
tendons
You move because ________________________. - ANS-Pairs of skeletal muscles work together
When one muscle of a pair contracts, the other____. - ANS-Relaxes
Trapezius - ANS-O: occipital bone, Ligamentum nuchae, spinous processes thoracic vertebrae
I: Lateral 1/3 of clavicle, acromion, spine of scapula
A: retracts scapular; Upper fibers raise scapula; middle fibers retract (adduct and downward rotation)
scapula; lower fibers lower scapula; synergistically works with lower serratus anterior to upwardly
rotate scapula during abduction of arm
N: Spinal accessory nerve
Latissimus Dorsi - ANS-O: spinous processes of lower thoracic, lumber and upper sacral vertebrae; iliac
crest; lower ribs
I: floor of the intertubercular groove of the humerus
A: adduct, extend arm, inwardly rotate arm; prevents upward displacement of the humerus
N: thoracodorsal nerve (middle subscapular)
Levator Scapulae - ANS-O: Transverse processes of C1-C3 or C4
I: superior angle of the scapula
A: elevate scapula
N: ventral primary rami of C3 and C4 nerves
Rhomboideus Major - ANS-O: Spinous processes of T2-T5
I: medial border of the scapula inferior to scapular spine
A: retract scapula (adduct and downward rotation)
N: dorsal scapular nerve
Rhomboideus Minor - ANS-O: lower ligamentum nuchae, and spinous processes of C7- T1
I: medial border of the scapula at the base of the scapular spine
A: retract scapula (adduct and downward rotation)
N: dorsal scapular nerve
Serratus Posterior Superior - ANS... [Show Less]