Skeletal System

Skeletal System

Framework of bones, cartilage and ligaments

What are major functions of the skeletal System?

Support, Protect, Move, Store mineral salts, Blood cell production

Bone is an

Organ

What is bone composed of?

Bone tissue, cartilage, epithelial tissue, fibrous connective, blood vessels, and nervous tissue

Osteocytes

Large intercellar spaces separating mature cells

Matrix

Hard composite material (calcium phosphate)

Compact bones

Few gaps, 80% of bone mass, thicker, protection and support

Spongy Bone

Open porous network, lightens bone and provide space for marrow, covered by compact bone

Diaphysis

Long, main shaft ( compact bone)

Epiphysis

Expanded ends (spongy Bone)

Epiphyseal plate

Active plate of cartilage where bone growth occurs of lengthen bone

Articular cartilage

Hyaline cartilage covering epiphysis

Periosteum

Dense fibrous tissue covering surface of bone

Medullary cavity

Hollow chamber in shaft of bone filled with yellow marrow (fat)

Osteoblast

Forms bone matrix

Osteocyte

Maintains bone tissue

Osteoclast

Breakdown bone

Suture

Immovable joints between flat bones of the skull

Condyle

Rounded process of a bone; usually forming a joint

Process

Projection from a bone; usually the site of tendon or ligament attachment

Foramen

An opening in a bone ( allows blood vessels and nerves to pass