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The muscular system makes movement possible. - PowerPoint PPT Presentation


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The muscular system makes movement possible. The human body is made up of systems that work together to perform necessary functions. Muscles are involved in every movement of the body. Muscles are made of individual cells called muscle fibers. Muscles perform important functions.

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Presentation Transcript
the muscular system makes movement possible

The muscular system makes movement possible.

The human body is made up of systems that work together to perform necessary functions.

slide2

Muscles are involved in every movement of the body.

Muscles are made of individual cells called muscle fibers.

Muscles perform important functions.

Each muscle fiber or strand can contract or stretch.

Muscles allow your body to move, to generate heat, and to maintain posture.

slide3

The muscular system works with the skeletal system to allow movement.

Individual cells, called muscle fibers, contract and relax.

Muscles are attached to bone by stretchy connective tissue, and, working in pairs, they contract and relax to move the body.

slide4

Muscles assist in homeostasis by functioning to maintain body temperature.

When muscles contract they release heat, so the quick muscle contractions that occur when you shiver release heat and raise your body temperature.

slide5

Muscles make constant, automatic, tiny adjustments to keep you sitting or standing upright.

The muscles that maintain posture are only completely relaxed when you are unconscious.

slide6

The body has three types of muscles.

Skeletal muscles are attached to the skeleton.

Smooth muscle are found inside certain organs

Cardiac muscle is found in the heart.

slide7

Definition:

attached to the skeleton

Characteristics:

Perform voluntary movement

Skeletal Muscles

Example:

Leg muscles

Nonexample:

Heart muscles

slide8

Definition:

Muscles that move when you want them to.

Characteristics:

Made of long fibers

Voluntary Muscles

Example:

Leg muscles

Nonexample:

Smooth muscle

smooth muscles
Smooth Muscles

Smooth muscles are the muscles that perform automatic movement inside the intestines and the stomach.

Smooth muscles are involuntary, while skeletal muscles are not.

Smooth muscles are found in organs while skeletal muscles are attached to the skeleton.

slide10

Definition:

Muscle the heart is made of.

Characteristics:

Has a branched shape

Cardiac Muscle

Example:

The muscle cells in the heart

Nonexamples:

Stomach muscles

skeletal muscles and tendons allow bones to move
Skeletal muscles and tendons allow bones to move.

The tendon is the link between the muscle and the bone. When a muscle contracts, it pulls on the tendon, which pulls the bone.

slide12

During early childhood muscles are not yet well developed.

As humans grow older, muscles develop and become more coordinated.

Muscles grow and heal.

Regular exercise increases muscle size.

Sore muscles indicate damaged muscle fibers.

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