BIO 203 Lecture Notes - Lecture 24: Extracellular Fluid, Lymphatic System, Broccoli
18 Aug 2018
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Chondrocyte: cartilage cells that secrete extracellular matrix scaffold for bone to grow on. Osteoblast: cells that take calcium and inorganic phosphate from plasma and use it to build bone. Osteoclasts: cells that remove calcium and inorganic phosphate from bone and deposit it in plasma. Osteocyte: mature, inactive osteoblasts found in bones that have stopped lengthening. Bones start out as cartilage in a fetus. Growth continues at the ends of long bones in areas known as epiphyseal plates until the end of puberty. Epiphyseal closure occurs when bones stop growing. Bone growth may be restarted after injury. Red stuff is bone marrow being formed inside the bone in between the osteoblasts. Able to dissolve mineral and get calcium out. Calcitriol (vitamin d) [regulates absorption of calcium] A source of calcium in your diet; dairy products. Lactose intolerant - broccoli (green leafy vegetables), fish, supplements, eating the shells. Take in calcium from the small intestine, absorbed with both active and passive transport.
