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The Muscular System (Structure & Organizational Levels (Muscle fibber…
The Muscular System
Types of Muscle Tissue
3 types of muscle tissue
Cardiac muscle
occurs only in heart, where it constitutes bulk of heart walls
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Smooth muscle
found in the walls of hollow visceral organs, such as the stomach, urinary bladder, & respiratory passages
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Skeletal muscle
composed of cylindrical multinucleate cells w/ obvious striations; muscle(s) attached to body’s skeleton; voluntary muscle.
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Names of Muscles
Muscles of the Trunk
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Trapezius
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location: back of neck, shoulders, & upper back
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Pectoralis major
function: flexion of humerus, adducts humerus, rotates humerus medially, & keep arm attached to trunk
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Muscles of the Arms
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Deltoid
function: flex shoulder joint & rotate it, and abduction of arm
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Muscles of the Head
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Masseter
function: help bite down or chew, pull lower jaw upward
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Temporalis
function: move mandible, retract & move side to side
location: side of head, near temples
Platysma
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location: portion of neck, chest, & face
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