PLN 103 Lecture Notes - Lecture 7: Calcium Hydroxide, Parietal Bone, Medullary Cavity

• School: Ryerson University
• Department: Physiology
• Course: PLN 103
• Professor: Nick Bellissimo

Document Summary

Five primary functions of the skeletal system: support, storage of minerals (calcium) and lipids (yellow marrow), blood cell production (red marrow), protection, leverage (force of motion) Bones classified by: shape, internal tissue organization, bone markings (surface features; marks) Six bone shapes: sutural bones, irregular bones, short bones, flat bones, long bones, sesamoid bones. Sutural bones: small, irregular bones, found between the flat bones of the skull. Irregular bones: have complex shapes examples: spinal vertebrae, pelvic bones. Short bones: small and thick examples: ankle and wrist bones. Flat bones: thin with parallel surfaces, found in the skull, sternum, ribs, and scapulae. Long bones: long and thin, found in arms, legs, hands, feet, fingers, and toes. Sesamoid bones: small and flat, develop inside tendons near joints of knees, hands, and feet. Elevations or projections: where tendons and ligaments attach @ articulations with other bones. Diaphysis: the shaft, a heavy wall of compact bone, or dense bone, acentral space called medullary (marrow) cavity.