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Anatomy
Bone
| Lecture 2 | Bone Tissue |
|---|---|
| osteogenic cell | develops into an osteoblast , stem cell |
| osteoblast cell | forms bone tissue, makes matrix |
| osteocyte cell | maintains bone tissue |
| osteoclast cell | destroys bone material,white blood cell |
| extracellular matrix | 25% water, 25% protein/organic matrix, 50 % crystalized mineral salts |
| dangers of lead, gold, strontium, plutonium | radiation from the inside out, causes cancer, can get in bone matrix |
| compact bone | arranged in osteons or haversian systems |
| osteons or haversian canel | contain blood vessels, lymphatic vessels and nerves |
| concentric rings | surround osteon or canel |
| lines of stress | osteons are aligned in same direction along lines of stress |
| osteon is | concentric rings (lamellae) of calcified matrix |
| Osteocytes found | lacunae |
| osteocytes communicate | canaliculi |
| canaliculi | filled with extracellular fluid and connect cells to each other |
| interstitial lamellae | older osteons |
| outer circumferential lamella | outside of bone, grows after pressure is applied |
| nutrient foramen | hole vessels enter |
| spongy bone | made from trabeculae |
| trabeculae | thin plates of bone that form around stress planes |
| red bone marrow | located between trabeculae |
| place blood cells develop | red marrow |
| spongy bone found | ends of long bones and inside flat bones |
| spongy bones and osteons? | no osteons |
| end of bone name | epiphyses |