Defintions
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| Occipitofrontalis | raises the eyebrows
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| orbicularisoculi | closes the eyelids
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| orbicularis oris | puckers the lips
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| buccinator | flattens the cheeks
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| Zygomaticus | smiling muscle
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| Levator labii superioris | sneering
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| depressor anguli oris | frowning
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| sternocleidomastoid | lateral neck muscle and prime mover
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| platsyma | sheetlike muscle that covers the anterolateral neck
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| erecotor spinae | group of muscles on each side of the back
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| external intercostal | elevate the ribs during inspirtation
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| internal intercostals | contract during forced expiration
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| diaphragm | accomplishes quiet breathing
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| one of the strongest muscles | temporalis
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| trapezius | rotates scapula
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| serratus anterior | pulls scapula anteriorly
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| pectoralis major | adducts and flexes the arm
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| Latissimus dorsi | medially rotates, adducts, and powerfully extends arm
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| deltoid | attaches the humerous to the scapula and clavicle
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| triceps brachii | extends the forearm
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| biceps brachii | flexes the forearm : occupies the anterior compartment of arm
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| brachialis | flexes forearm
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| brachioradialis | flexes and supinates the forearm
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| retinaculum | strong band of fiberous connective tissue that covers the flexor and extensor tendons and holds them into place around the wrist so that they don't bowstring during muscle contraction
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| flexor carpi | flexes the wrist
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| extensor carpi | extends the wrist
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| flexor digitorumf | flexes the fingers
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| extensor digitorum | extends the fingers
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| intrinsic hand muscles | located within hand
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| interossi muscles | located between the metacarpals
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| gluteus maximus | buttocks
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| quadriceps femoris | extends the leg; anterior thigh muscle
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| sartorius | tailors muscle (flexes the thigh)
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| hamstring | posterior thigh muscles; flexes the leg and extends the thigh
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| Gastrocnemius and soleus | form of the calf muscle
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| Calcaneal tendon also known as | Achilles tendon
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| Lateral muscle of the leg | peroneus
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| instrinsic foot | muscles flex, extend, abduct, and adduct the toes
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| extrinsic | moves the tongue
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| instrinsic | changes the shape of the tongue
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| Tendinous inscriptions | cross the rectus abdominis at three or more locations
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| linea alba | consists of white connective tissue rather than muscle
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| on each side of the linea alba is the | Rectuys Abdominis
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| contraction | process of becoming smaller
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| Muscle Fibers | Cell composed of my fibers that contract when stimulated
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| Skeletal muscle | connected to the skeleton to form part of mechanical system
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| endomsyium | ensheaths each individual myocyte
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| Perimsyium | shealth of connective surrounding a bundle of muscle fibers
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| Epimysium | fiberous elastic tissues surrounding a muscle
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| Fasicle | Bundle of structures
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| Smooth Muscle | contractile fibers are not highly ordered
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| Cardiac Muscle | Another term for myocaridum
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| Sarcolemma | fine transparent tubular shealth
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| sarcomere | structural unit of a myofiber in striated muscle
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| myosin | fibrous protein that forms the contractile filaments of muscle
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| Actin | protein that forms (together with myosin)
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| Sarcoplasmic reticulum | specialized endoplasmic of cardiac muscle
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| motor unit | made up of a motor neuron and the skeletal muscle
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| axon | long threadlike part of a nerve cell
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| Acetylcholine | Compound that occurs throughout the nervous system
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| Muscle Fatigue | Muscle to generate force
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| Isotonic Contractions | length of muscle changes
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| Isometric contractions | strength training in which joint angle and muscle length do not change
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| origin | where something begins
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| insertion | action of inserting something
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| synergists | a substance organ
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| antagonist | substances that inhibits physiological action
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| fixators | muscle that acts of a stabilizer
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| four major functional characteristics | contractility, excitability, elasticity, extensibility
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| each skeletal muscle is surrounded by a connective tissue shealth called | Epimysium
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| Fascia | another connective tissue located outside epimysium
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| Muscle composed of numerous visible bundles | Fasiculli
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| Each side of a "Z line" is an | I band
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| What kind of line is in between two A bands? | M line
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| Contractility | shorten with force
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| Excitability | capacity to respond to a stimulus
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| extensibillity | ability to stretch
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| elaasticity | ability to recoil to original stretch
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| muscle fiber | single cylindril cell containing several nuclei
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