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NRTC Chap 6
A&P
Question | Answer |
---|---|
Longer than they are wide | Long bones |
Broad as they are long | Short bones |
Various sized and shaped | Irregular bones |
Flat, thin, often curved | Flat bones |
Shaft-like portion of the bone | Diaphysis |
Bulbous structure | Epiphysis |
Covering surface of the epiphysis | Articular cartilage |
Hollow portion | Medullary cavity |
Dense fibrous membrane that covers the diaphysis | Periosteum |
Red bone marrow | Blood cell-producing |
Yellow marrow | Rich in fat |
Medullary cavity is lined with thin epithelial membrane | Endosteum |
What separates the epiphysis from the diaphysis at each end of a long bone | Epiphyseal plate/growth plate |
Osteoblasts | help form bone by secreting substances that comprise the bone's matrix |
Osteoclasts | dissolve unwanted or unhealthy bone |
Osteocytes | Mature osteoblasts that have become entrapped in the hardened bone matrix |
Osseous tissue | Bone |
Collagen fibers in the matrix make bone highly resistant to stretching forces | Tensile strength |
Calcium salts allow bones to resist strong squeezing forces | Compressional strength |
Bone lacks the ability to endure twisting | Torsional strength |
Consisting of latticework | Spongy/trabeculae |
Elaborate network of canals and passageways containing nerves and blood vessels | Compact bone |
4 factors that affect bone growth and maintenance | Heredity, Nutrition, Hormones, Exercise |
Simple fracture | bone remains aligned and the surrounding tissue is intact |
Compound fracture | bone has pierced the skin |
Greenstick fracture | incomplete, similar to when a green stick breaks |
Comminuted fracture | bone is broken into pieces |
Spiral fracture | result of twisting force |