Muscular System 600 Muscles

Science Keyterms

•Muscle•Voluntary muscle•Involuntary muscle•Skeletal muscle•Smooth muscle•Cardiac muscle•Tendon

Functions of Muscular System

• Provide movement for the body

•Produce heat•Helps with the movement of

food through the digestive system

•Helps you breath•Helps with the beating of

your heart

Occuli

Sternomastoid

Pectoralis Major

Bicep Brachii

External Oblique

Sartorius

Extensor Digitorum

Tibialis Anterior

Quadriceps

Abdominals

Facial Buccinators

Moving the human body

•Muscle-an organ that contracts and gets shorter- this provides the force to move your body parts.

Muscles of thebody

Muscle Control

• Voluntary muscles- muscles that you are able to control

• Examples are leg and arm muscles -most of the muscles that attach to bones

• Involuntary Muscles- you can not move them consciously. They just keep working

• Examples- heart , blood vessels

Types of Muscles-skeletal

• Skeletal Muscles-muscles that move bones

• Attached to bones by tendons

• Most numerous in the body• Look striped or striated• Voluntary muscles – you

can control when they move

Types of Muscles-Smooth Muscles

• Smooth muscles- nonstriated

• Involuntary – cannot control them consciously

• Move the internal organs• Contract and relax slowly• Example- small intestine,

stomach muscles

Types of Muscles-Cardiac Muscle

• Cardiac muscle-found only in the heart

• Involuntary – you cannot control when it beats

• Striations• Contracts about 70 times

a minute every day of your life.

Types of Muscles

3 types of muscles?

How Muscles Work

• Skeletal muscles-when one muscles contracts- another muscle relaxes

• Muscles always pull- never push

• Muscles use glucose – chemical energy

• Produce thermal (heat) energy when they contract

• Muscles that are not exercised become smaller

How muscles work

Muscles and bones work together

•Skeletal system working together with the Muscular System

Working together

Let’s Review

How Muscles Work

• When bundles of muscles are stimulated by nerve impulses, or signals, they ___contract____________, or shorten.

• When they relax, the bundles stretch.

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Types of Muscles

Three Types of Muscle Tissue

______________________

______________________

______________________

What Muscles Do

•___Muscle___movements help you _________, make your _______ beat, and move food through your digestive system.

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Types of Muscles

___________________ are involuntary muscles.

_________________________Muscles that act on the lining of the body’s passageways and hollow internal organs

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Types of Muscles

• ______________________ is involuntary and is responsible for the contraction of your heart. Your heart beats 100,000 times each day.

_____________________

A type of striated muscle that forms the wall of the heart

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Types of Muscles

•Most of your muscle tissue is skeletal, and almost all _________________ are under voluntary control.

__________________________Muscles attached to bone that cause body movements

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What Muscles Do

•Skeletal muscles work in pairs to produce movement.

Body Movements

•Flexing of the hamstring.

•When you bend your knee, the quadriceps muscle relaxes and the hamstring muscle contracts.

Body Movements cont.

• Extension of the quadriceps.

• When the leg is straightthe hamstring musclerelaxes (stretched) and the quadriceps muscle contracts or shortens.