Muscular System Elina Shibata

Major Functions of the Muscular System

Names of all the muscles

3 types of muscle tissues

Body Movement Terminology

Structure and Organizational levels of the Skeletal Muscle

Disorders associated with the Muscular System

Smooth

Skeletal

Cardiac

Location

Function

Characteristics

Location

Function

Characteristics

Location

Function

Characteristics

Striated

Involuntary

heart

Pumps blood through the circulatory system

Smooth

Involuntary

stomach

arteries

intestine walls

Regulates the flow of blood and the arteries and air through the lungs

Striated

Voluntary

around bones and other muscles

Aids in the overall movement of the body

Contracts and extends voluntarily

Muscle Fiber

Endomysium

Perimysium

Fascicle

Epimysium

Muscle

Myofibril

consists of hundreds to thousands of muscle cells, connective tissue wrappings, blood vessels, and nerve fibers

covers external muscle

discrete bundle of muscle calls, segregated from the rest of the muscle by connective tissue shath

surrounds fascicles

elongated multi-nucleated cell, banded

surrounds muscle fiber

contractile elements that occupy most of the muscle cell volume, composed of sarcomeres arranged end to end and they appear banded

Sarcomere

contractile unit, composed of myofilaments made up of contractile proteins

Myofilament

contractile myofilaments are thick and thin

thick : bundled myosin molecules

thin : actin molecules

hyperflexion

eversion

hyperextension

inversion

flexion

pronation

extension

supination

adduction

rotation

abduction

circumduction

tilt

deviation

dorsiflexion

plantar flexion

movement

helps to stabilize joints

maintain posture

generate heat during activity

voluntary and controlled by skeletal muscles

involuntary and controlled by smooth muscles

muscular dystrophy

myalgia

muscle strain

torn muscle

fibromyalgia