Types of Bones
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Classification of Bones: Long, Short, Flat, Irregular, and Sesamoid Bones
1. Long Bones
Definition: Long bones are characterized by their greater length than width.
Structure: They consist of a shaft with normally two extremities.
Examples: Humerus, femur, tibia, fibula, ulna, radius, metacarpal, metatarsals, and phalanges.
2. Short Bones
Definition: Short bones are typically as long as they are wide.
Examples: Carpals and tarsals.
3. Flat Bones
Definition: Flat bones are thin and sandwiched between two compact layers.
Function: They provide protection and offer large areas for muscle attachment.
Examples: Scapula, cranial bones, ribs, and the sternum.
4. Irregular Bones
Definition: Irregular bones have complex shapes that don't fit into the previous categories.
Example: Vertebrae.
5. Sesamoid Bones
Definition: Sesamoid bones develop within tendons at sites of high friction or tension.
Function: They improve leverage and protect joints from damage.
Example: Patella (kneecap).
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