Skeletal System and Muscular System

upper and lower extermities, shoulder and hip bones

skull,ribs and vertebrae

Connect muscle to bone

Hinge joint

elbow

knee

Pivot joint

neck

Imovable joint

skull

gliding joint

wrist

ankle

Ball socket joint

hips

shoulders

Connects muscle to bone

stores minerals

to make blood cells

for structure

movement

protect organs

Spongy Bone

Light wieght, strong, many spaces

Boens are hard

They are made up of hard minerals-calcium and phosporus

Compact Bone

very hard, not solid

many small canals, where blood vesels enter and leave

Outer membrane

where blood vessels and nerves enter and leave bone

Red Marrow

Red blood cells made

Yellow Marrow

Fat is stored

Injuries

Cramp

muscel contracts strongly

Tear

Muscel streches to far, pulled apart

Happens when muscels are over-worked

How Muscels Work

one contracts, one relaxes

Muscels release energy from breaking down gluose

Muscel Control

Voluntary

You dont have to think about it

Ex. Running, turning a book

Involuntary

Muscel you control

Ex. Cardiac

Types Of Muscel

Skeletal

attached to skeleton

React and tire quickly

attached to bone by tendon

Smooth

Found In internal organs

React slow, does'nt tire easy

Cardiac

found in heart

does'nt tire quickly