Muscular system notes, Anatomy Exam I Muscle O, I, A, N's, Muscle Anatomy, Muscular System

Muscular system notes, Anatomy Exam I Muscle O, I, A, N's, Muscle Anatomy, Muscular System Muscular system - ANS-Collection of muscles whose primary 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-O: ligamentum nuchae, spinous processes of lower cervical and upper thoracic vertebrae I: ribs 2-5 A: elevates rib cage to aid in inspiration N: ventral primary rami of T1-T3 or T4 spinal nerves Continues...