Osteoporotic bones have lost density or mass and contain. Through the medullary spaces, it hosts, the bone provides structural. It protects several vital organs (skull, vertebrae and rib cage). Functionally, it assumes a significant mechanical role by the skeleton, and represents a stock of mineral salts to mobilize for maintenance of calcium and phosphorus homeostasis. There is also a notch on each side through which the spinal nerves, which serve the body at that level, can exit from the spinal cord. When osteoporosis occurs, the holes and spaces in the honeycomb are much larger than in healthy bone. Bone is the primary anatomical structure comprising of the human skeletal system. (credit a: modification of work by Uwe Gille based on original work by Gray's Anatomy credit b: modification of work by NCI, NIH)Įach vertebral body has a large hole in the center through which the nerves of the spinal cord pass. (b) Spinal curves increase the strength and flexibility of the spine. Osteoblasts secrete the osteoid into this membrane to form a spongelike network of bony processes called trabeculae. choice of, 178179 Cranial sutures, 33 Cranial vault, 33 flat bones. the hard, rigid form of connective tissue constituting most of the skeleton of vertebrates, composed chiefly of calcium salts. The flat bones of the skull are not preformed in cartilage like compact bone but begin as fibrous membranes consisting largely of collagen and blood vessels. \): (a) The vertebral column consists of seven cervical vertebrae (C1–7) twelve thoracic vertebrae (Th1–12), five lumbar vertebrae (L1–5), the os sacrum, and the coccyx. interbracket bend and, 301303 definition of, 288 forces, equivalence of.
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