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Muscular System. By: Emily Brosten Stephanie Elhard JAMES VALLEY VOCATIONAL TECHNICAL CENTER. Introduction. 1. 600 muscles in the body 2. Muscles are ~ made of bundles of muscle fibers which are held together by connective tissue.

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Muscular system

Muscular System

By: Emily Brosten

Stephanie Elhard

JAMES VALLEY VOCATIONAL TECHNICAL CENTER


Introduction
Introduction

  • 1. 600 muscles in the body

  • 2. Muscles are ~ made of bundles of muscle fibers which are held together by connective tissue.



  • Voluntary contract or become short and thick. ~ you can willfully control muscles *facial expressions, chewing, swallowing, and movement of the head


  • Involuntary ~ contract or become short and thick. function without the person thinking about contracting the muscles. *digestive system, heart muscles, and blood vessels **Some muscles are both voluntary and involuntary ~ example eye blinking


Three types of muscles

THREE TYPES OF MUSCLES contract or become short and thick.


  • 1. Cardiac muscles ~ contract or become short and thick. cells are packed so closely together its hard to tell one cell from another. ~forms walls of the heart ~contact to circulate blood ~involuntary



  • 3. Skeletal body *digestive, respiratory system, blood vessels, and eyes. ~muscles contract to cause movement in these areas ~involuntary function without the person thinking about contracting the muscle~ most abundant muscle ~attached to bone ~causes body to move ~voluntary


Functions of skeletal muscles

FUNCTIONS OF SKELETAL MUSCLES body *digestive, respiratory system, blood vessels, and eyes. ~muscles contract to cause movement in these areas ~involuntary function without the person thinking about contracting the muscle


  • 1. Attaches to bones to provide voluntary movement. body *digestive, respiratory system, blood vessels, and eyes. ~muscles contract to cause movement in these areas ~involuntary function without the person thinking about contracting the muscle

  • 2. During contractions provide heat and energy.


  • 3. Helps maintain posture. body *digestive, respiratory system, blood vessels, and eyes. ~muscles contract to cause movement in these areas ~involuntary function without the person thinking about contracting the muscle

  • 4. Some protect internal organs.


Skeletal muscles attach to bones in various ways

SKELETAL MUSCLES ATTACH TO BONES body *digestive, respiratory system, blood vessels, and eyes. ~muscles contract to cause movement in these areas ~involuntary function without the person thinking about contracting the muscleIN VARIOUS WAYS






Characteristics of muscle tissues

CHARACTERISTICS that moves -where the muscle ends OFMUSCLE TISSUES


1. Contractability ~ ability to shorten and thicken (when muscles work they contract that is they get shorter and thicker)




Movement performed by muscles

MOVEMENT relaxed it becomes longer and thinner) *some muscles work while others relax *PERFORMEDBYMUSCLES



  • 3.Flexion relaxed it becomes longer and thinner) *some muscles work while others relax *(Flexor) ~ decreasing the angle between two bones and body part


  • 4. Extension relaxed it becomes longer and thinner) *some muscles work while others relax *( Extensor) ~ increasing the angle between two bones and body part







Terminology
Terminology the hand is turned downward.

  • Muscle tone: muscles that are partially contracted at all times, even when they may not be in use.


  • the study of muscles


  • Myology

    MYOLOGY results in bending of a joint.

    The Study of Muscles

    CHARTS


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