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Muscle System
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35
Biology
12th Grade
04/26/2010

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Term
Flexion
Definition
Bending a joint so that the angle of that joint decreases. Ex your elbow or knee
Term
Extension
Definition
Joint so that the angle of the joint increaes. Ex Straightening out your arm or leg
Term
Adduction
Definition
Moving the distal part of the bone toward the median axis of the body
Term
Abduction
Definition
Moving the distal of the bone away from the median axis of body.
Term
Sternocephalicus
Definition
Turn and depresses the head
Term
Cleido-mastiodeus
Definition
Flexes the foreleg
Term
Sternocephalicus
Definition
Turn and depresses the head
Term
Cleido-occipital
Definition
Flexes the foreleg
Term
Splenius
Definition
Moves head from side to side and elevates the head and neck
Term
Anterior deep pectoral
Definition
Adduct and retracts the forelimeb
Term
Suprasinatus
Definition
Extends the scapula
Term
Deltoid
Definition
flexes thhe humerus
Term
Trapezius
Definition
Elevates the shoulder
Term
Lastissimus dorsi
Definition
Draw the humerus upward and backward, also flexes the shoulder
Term
Tensor fasciae latae
Definition
extends leg
Term
Gluteus medius
Definition
Abduct the thigh
Term
Biceps femoris
Definition
abducts and extends the hind leg
Term
Semimenbranosus
Definition
Extends hip and flexes the hip joint
Term
semittendinosus
Definition
Extends hip, flexes knee joint
Term
Gastrcnemius
Definition
Extends the foot
Term
Digital flexor
Definition
Flexes the digits
Term
Digital extensors
Definition
Extends the digits
Term
Peroneus longus
Definition
Flexes the ankle
Term
Peroneus tertius
Definition
Flexes the foot
Term
Transverse abdominus
Definition
Constricts abdomen, arches the back
Term
Internal oblique
Definition
Constricts abdomen, arches the back
Term
External obligue
Definition
constricts abdomen, arches the back
Term
Triceps
Definition
Extends the forelimb. The triceps are dividedinto three regions: the long head, the medial head, and the lateral head.
Term
Extensor digitorum lateralis
Definition
Extension of the digits
Term
Extensor carpi ulnaris
Definition
extends the wrist
Term
Extensor digitorum communis
Definition
extension of the digits
Term
Extensor carpi radialis
Definition
rotation of the front foot
Term
Brachialis
Definition
flexes the elbow
Term
Sternohvoideus
Definition
used in swallowing retracts and depresses the hyoid
Term
Masseter
Definition
Closes the mouth and elevates the jaw
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