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ASMT- A&P #4
Osteology
Question | Answer |
---|---|
Bone Tissue (make-up) | connective tissue, has cells, extracellular matrix, rigid |
Bone Tissue (properties) | resists tension, resists compression, ability to remodel/change |
Osteoblasts | build bone |
Osteocytes | regulate, monitor bone |
Osteoclasts | breaks down bone/cuts bone, reabsorbs bone |
Extracellular Matrix | Collagen, bone salts/minerals, hydroxyapatite |
Too much collagen causes bone to be... | soft |
Too much hydroxyapetite causes bone to be... | brittle/hard |
Compact Bone | covers spongy bone, microscopically porous |
The fundamental structural unit of compact bone | osteon |
Spongy or Trabecular Bone | delicate meshwork of interconncted plates/beams of bone called trabeculae |
The structural feature of spongy bone | trabeculae |
4 Main Types of Bones | long, short, flat, irregular |
Periosteum | external bone covering, dense irregular CT, has blood vessels & nerves |
Articular Cartilage | hyaline carilage, reduces friction at movable joints |
Diaphysis | long part of the bone |
Epiphysis | ends of bone |
Metaphysis | separates diaphysis and epiphysis |
Medullary Cavity | filled by bone marrow, and permeated by many blood vessels |
Nutrient Foramen | hole in bone that carries blood vessels |
Functions of Bone Tissue and Bones | support, movement, protection, calcium homeostasis, blood-cell formation, energy storage |