Describe events during cartilage model formation Include each of the following

Describe events during cartilage model formation

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12.Describe events during cartilage model formation. Includeeach of the following: a. nutrient artery penetration – Nutrient artery penetration occurs during the development of the ossification center. When an arterial vessel penetrates the bones from the perichondrium it increases the availability of nutrients to the surrounding cells. b. Osteogenic cells and osteoblasts – The nutrient artery penetration stimulates nearby osteogenic cells and turns into osteoblasts. c. Contrast the perichondrium and the periosteum . – The perichondrium is the connective tissue on the surface of cartilage. The periosteum is the connective tissue on the surface of the bone.
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13. Describe (step 2) growth of the cartilage model . Include each of the following: Embryonic mesenchyme condenses and turns into chondroblasts. The chondroblasts begin secreting cartilage matrix and form the cartilage model. As more of the cartilage model is deposited, the cartilage grows more within the fetus. 14. Describe (step 3) bone collar and periosteum formation . A nutrient artery penetrated the perichondrium increasing nutrient availability to the cells. Osteogenic cells develop into osteoblasts, which then deposit bone matrix under perichondrium to form a thin shell of compact bone. This is known as the bone collar. Once the perichondrium begins to form bone, it is known as the periosteum. 15. Describe (step 4) primary ossification center formation. a. Nutrient deprival – Nutrient deprival is when the bone collar prevents diffusion of nutrients to the interior cartilage area. b. Osteocyte carrying capillaries – These capillaries carry osteoblasts and as the cartilage in the interior area disintegrate due to a lack of nutrients the capillaries penetrate into the interior and bring the osteoblasts that will begin to lay down the matrix.
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