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JB anatom Phys

Muscular System

Muscular System functions movement, maintanance of posture, and production of heat
A characteristic of muscle tissue is ____________. This means that it will espond to a stimulus that requires action of the nerves irritability
a characteristic of muscle tissue is _____________________________ and ____________________. This means it can stretch and resume former length extensibility, elasticity
muscle tissue is _________. This means it can shorten and thicken to exert pull. contractable
muscle tissue-tone: slight tension
Muscle tissue fatique the ability to respond to a stimulus
naming muscles 1. shapes (deltoid (triangular)serratus (sawtooth) and trapizius (trapezoid) 2. sizes 3. points of attachement 4. location 5. action 6. direction of muscle fibers
muscles are used for facial expression: frontalis (raise eyesbrows. orbicularis (close eyes), orbicular oris (pucker mouth, buccinator (whistle, blow), and zygomaticus (smile)
Muscles that move the head are: sternocleidomastoid: flex the head trapezius: hold up and extend the head
deltoid abduct the arm; used for IM injections
pectoralis major and minor extend and abduct the arm
serratus anterior pulls the scapula down and forward
latissimus dorsi extends and helps adduct the arm
biceps brachii flexes teh lower arm and supinates the hand
triceps brachii extends teh lower arm (forearm)
muscles of respiration diaphragm and intercostals
muscles of the abdominal wall rectus abdominus, transverse abdominus, internal oblique, external oblique
iliosoas flexes the thigh
gluteus maximus extends the leg
gluteus medius abducts the thigh; IM injections
adductor longus, gracilus, and adductor magnus adducts the thigh
qyuadriceps (rectus femoris, vastus lateralis, vastus medialis extend the leg
hamstring group (biceps femoris, semitendinosus, and semimembranous flex the leg
sartorius longest muscle in teh body; used to cross legs
gastrocnemius calf muscle used for planter flexion (stand on tiptoe)
tibialis anterior dorsiflexes the foot
peroneous used for eversion of the foot
smooth muscles located in the visceral organs under the control of the autonomic nervous system
Created by: schxoxo