The Skeleton

Functions

Structure

Axial Skeleton: Supports the central axis of the body

Appendicular Skeleton

Skull

Vertebral column

Rib cage

Legs

Arms

Pelvis

Shoulders

Supports the body

Protect internal organs

Assists movement

Stores Minerals

Blood cell formation site

Bones: Solid network of living tissue that is surrounded by calcium deposits

Structure

Periosteum: connective tissue that surrounds the bone

Thick layer of compact, non solid bone beneath the periosteum

Haversian channels: Channels in the compact bone that contain nerves and blood vessels

Spongy Bone

Bone Marrow: Soft tissue located in the cavity of the bone

Red bone marrow: Storages stem cells that produce blood cells

Yellow bone marrow: Keeps fat

Development

Cartilage: Type of connective tissue that does not contain blood vessels. It composes the majority of the early bone in a embryo

Ossification: Process in which cartilage is replaced by the bone in the skeletal composition

Osteoblasts: Cells that help the ossification process by secreting minerals into the bones

Osteocytes: Mature form of osteoblasts. Mantains minerals and makes the bone strong

Osteoclasts: Cells that break down minerals so that the bone can be rearranged and healed