The thyroid gland excretes calcitonin which

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The thyroid gland excretes Calcitonin which stimulates the osteoblasts. This activity removes calcium from the blood. Conversely, the parathyroid gland excretes Parathyroid hormone which stimulates the osteoclasts. These cells break down bone cells and releases calcium into the blood stream One Last Quick Check Fill in the blanks 49. There are five types of bones (based on shapes) 50. The medullary cavity is the hollow area inside the diaphysis of a bone. 51. A thin layer of cartilage covering each epiphysis is the articular cartilage . 52. The endosteum lines the medullary cavity of long bones. 53. Hematopoiesis is used to describe the process of blood cell formation. 54. Blood cell formation is a vital process carried on in red bone marrow . 55. The periosteum is a strong fibrous membrane that covers a long bone except at joint surfaces. P. 201 P. 203 P. 202 P. 203 P. 200 P. 207 P. 202
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Chapter 7 6 56. Bones may be classified by shape. Those shapes include long, short, irregular, flat, and sesmoid . 57. Bones serve as the major reservoir for calcium , a vital substance required for normal nerve and muscle function. 58. Hyaline is the most abundant type of cartilage. Matching 59. D Trabeculae 60. B Compact 61. E Spongy 62. A Periosteum 63. C Cartilage 64. I Osteocytes 65. F Canaliculi 66. J Lamellae 67. G Chondrocytes
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