The Skeletal System
description
Transcript of The Skeletal System
The Skeletal System
Mini-Lecture One
The Skeleton• Word comes from the Greek Word meaning “dried-up” body.
2 subdivisions: • Axial• Appendicular
Components of the Skeletal System:
• 206 Bones
• Joints• Cartilage• Ligaments
Functions of Bone:
Support: Internal Framework of Body
Functions of Bone:
• Blood Cell Formation: (Hematopoiesis)–(hem’’ah-to-poi-e’sis)
Functions of Bone: • Protection: Protects soft body organs.
Functions of Bone:• Movement: Together with muscles they allow movement of the body.
• Storage–Fat–Minerals
•Calcium•Phosphorus
Functions of Bone:
Bones are Classified in Two Ways:
•By Tissue Type •By Shape
Bone Tissue• Compact:
–Dense–Looks “smooth”
• Spongy:–Small needlelike pieces of bone
–Lots of open space
Spongy bone
Compact bone
Shape of bones•Long•Short•Flat• Irregular
Long bonesMade up of
mostly compact bone
This is the traditional shape
of bone
Short bones Cube
Shaped
Mostly spongy bone
Flat Bones
•Thin
•Flat
•Usually Curved
• Examples: Skull, Ribs, Sternum
Compact with Spongy Bone
Irregular boneAll Other Bones
Examples: Vertebrae & Hip
Bones