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Intro to the Skeletal System
107
Transcript
- Flat bones
- Thin and flattened
- Thin layers of compact bone around a layer of spongy bone
- Examples: Skull, ribs, sternum
- Irregular bones
- Irregular shape
- Do not fit into other bone classification categories
- Example: Vertebrae and hip
- Compact bone
- Location: outer part of diaphysis (long bones) and thinner surfaces of other bones
- Osteon: structural unit of compact bone
- Spongy bone
- Many open spaces
- Location: epiphyses of long bones and center of other bones
- No osteons
Bones of the Human Body
- The adult skeleton has 206 bones
- Two basic types of bone tissue
Intro to the Skeletal System
Parts of the skeletal system
- Bones (skeleton)
- Joints
- Cartilages: extracellular matrix is collagen and proteoglycans (good shock absorber)
- Bone’s extracellular matrix is collagen and minerals (flexible and able to bear weight)
- Tendons and ligaments’ extracellular matrix is collagen (very tough)
Divided into two divisions
- Axial skeleton
- Appendicular skeleton
Functions
- Support of the body
- Protection of soft organs
- Movement
- Storage of minerals and fats
- Blood cell formation
- Skeleton means “dried up body” – but this is inaccurate
Warm- Up Wed. Oct. 7th
Write down how this pictures can relate to Anatomy.
- Short bones
- Generally cube-shape
- Contain mostly spongy bone
- Examples: Carpals, tarsals
Classification of Bones
- Long bones
- Typically longer than wide
- Have a shaft with heads at both ends
- Contain mostly compact bone
- Examples: Femur, humerus
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