Bones & MusclesChapter 12

Bones & Muscles

BonesHard living tissues that make up your skeleton…

Support Frame of your “house”

&

Protect protects organs

Skull – brain Ribs – heart, lungs, stomach Spine (backbone) – spinal cord

◦ 33 bones called vertebrae Spinal cord carries messages from the brain to

the rest of the body.

Patella (kneecap) – knee joint and ends of leg bones

Protection

Ribs & Spine

Cells – tiny living parts that make up our bodies◦ Daily DEATH! (cells die everyday)◦ NEW LIFE! – every day dead cells are replaced

with new living cells.

Tissue – a group of cells working together◦ Bones are made of vary hard tissue

Production

Parts of a Bone

Hollow area with marrow

Hard compact bone

Blood vessels and nerves

Light sponge bone pg. 260

Bones have empty space in them. In some bones these area are filled with marrow.

Marrow◦Soft, jellylike material used to produce new blood cells.

Marrow

Minerals◦Your bones store minerals such as

calcium, magnesium, and phosphorus.

◦ Calcium – makes bones strong Milk & yogurt = good source of calcium

Your bones store minerals and then release them to the rest of your body as cells need them.

Storage

Mr. Bonesskull

phalanges

sternum

ribsvertebrae

femur

patella

Immovable MovableJoints

You

Hip Joint

Allows movement in many directions◦ Examples:

Shoulders Hips

Ball-and-Socket

Hinge Allows only back and forth movements

◦ This type of joint works like a door on a hinge. ◦ Example:

Elbows Knees

Allows side to side movement◦ Example:

Top vertebrae of the neck

Pivot