13.2 The Skeletal system

5 major functions:Provides shape and supportEnables you to moveProtects your organsProduces blood cellsStores minerals and other materials until your

body needs them.

Functions of the Skeletal system

Shape and supportSkeleton determines the shape of your bodyVertebral column (backbone) is the center of

the skeleton

Movement and protectionYour skeleton allows you to move. Muscles pull on the bones to make the body

move.Bones protect the organs : brain, heart, lungs

Production and storage of substancesMakes blood cellsStores minerals such as calcium and

phosphorus

Joints allow bones to move in different ways.Some joints do not move – immovable joints

(skull)Movable joints

Hinge jointsBall and socket jointPivot jointSliding joint

Joints of the skeleton

The bones in movable joints are held together by strong connective tissues called ligaments.

Cartilage, another connective tissue, covers the ends of the bones and keeps them from rubbing against each other.

Bones grow and develop

Bones- Strong and Living

Diet: Calcium and phosphorus – keeps the bones strongDairy products, green vegetables

Exercise: moving around makes your bones stronger and denser

Taking care of your bones

Osteoporosis: a condition in which the body’s bones become weak and break easily.