MUSCULAR SYSTEMPrepared by:

MARICARR D. ALEGRE

• Composed of muscle cells and tissues held tightly together in bundles

• There are more that 600 muscles in our body and make up more than half of our body weight

• Movement is brought about by the contraction and relaxation of muscles

PROPERTIES OF MUSCLES

Contractility

- able to become shorter and thicker

PROPERTIES OF MUSCLES

• Extensibility and elasticity– Ability of

muscles to be stretched and to return to their original form

PROPERTIES OF MUSCLES

• Irritability– Contraction of

muscle stimulated by several stimuli like heat, light, chemical pressure and electricity

KINDS OF MUSCLE(BASED ON ACTION)

• Voluntary Muscles

- they can be move at will

KINDS OF MUSCLE(BASED ON ACTION)

• Involuntary muscle

- cannot be moved intentionally

TYPES OF VOLUNTARY MUSCLES

• Skeletal muscles

- attached to the skeleton

- they are made to contract and move the skeleton whenever the person wants

TYPES OF VOLUNTARY MUSCLES

• Striated muscles

- appear to have stripes or striations

- a combination or light and dark muscle

TYPES OF INVOLUNTARY MUSCLES

• Smooth muscle

- found on the muscles of the intestines, brain and other organs

- without striations

TYPES OF INVOLUNTARY MUSCLES

• Cardiac muscle

- muscle of the heart

- striated but involuntary

TENDONS• A tissue that is

responsible for attaching the muscle to the bones