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