The Human Skeleton

Calcium

Calcium

Provides hardness and resistance to crushing.

Muscles

Attach to bones and use them as levers to move the body

Collagen (protein)

Provides strength and resilience

Infants

Have more than 300 bones at birth

Breastbone

Protects the lungs and heart

Diaphysis

The shaft of the bone

Bone marrow

Produces millions of blood cells per second.

Epiphyseal Plate

Areas made of cartilage allowing for the growth of the bone growth plate.

Ligaments

( bone-bone )

Tendons

( bone-muscle )

Periostern

Hard outer covering

Epiphysis

Ends of the bones

Diaphysis

The shaft of the bone

Articular Cartilage

Cushions the ends of the bones and allows for smooth movement

Osteocyte

Basic bone cell

Haversian

Canal opening

Axial Skeleton (80 bones)

Skull, vertebral column, rib cage

Appendicular Skeleton (126 bones)

Bones of upper & lower limbs

Long bones

Longer than they are wide, all limb bones

Short bones

Roughly cubed shaped, bones of the wrist and the ankle

Flat bones

Thin, flattened, usually a bit curved

Scapula

Shoulder blade

Sternum

Breast bone

Irregular bones

Weird shapes, vertebrae, hip bones, 2 skull bones

Compact Bone

Spongy Bone

Composed of irregular and interconnected channels

Extracellular Matrix

Collagen and Ca

Red bone marrow

blood cell production