Bones Skeleton SKELETON Function 1 Bodys framework 2
Bones & Skeleton
SKELETON: Function 1. Body’s framework 2. Cartilage and bone 3. Supports and protects body’s internal structures 4. Provides a system of levers 5. Bones store lipids and minerals
Bones: Classification by tissue type Compact Bone: • Dense • Fibers, are parallel to axis of bone • Resistant to twisting
Classification of Bone by tissue type: Spongy Bone: • Fibers have a more irregular pattern • Trabecular bone type • Site for hematopoiesis
All bones have: 1. Outer layer of compact 2. Inner layer of spongy
Classification of bone by shape: Long Bone: Definition: 1. longer than they are wide 2. Has ends Examples: • Femur • Humerus • phalanges
Classification of bone by shape: Short bone Definition: 1. Cube shaped 2. Contain more spongy than compact bone Example: 1. Tarsals
Classification of bone by shape: Flat Bone Definition: 1. Thin 2. Layer of compact with spongy bone in center. Examples: 1. Skull 2. ribs
Classification of bone by shape: Irregular Bone: Definition: bones do not fall into any other group Example • Vertebrae • sacrum
Axial vs. Appendicluar ➢ Axial: body’s center of gravity ➢ Appendicular: bones of the limbs or appendages
Bone Markings Site for muscle attachment: • Trochanter • Tuberosity • Epicondyle Sites that form joints: • Condyles • Head • Facet
Bone Markings Depressions: • Fossa • Fissure • Foramen Allow for passage of: • Nerves • Vessels
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