Ossification In Fetal Development Essay

818 Words 4 Pages
• Describe ossification in fetal development. During development, the fetal bones are made up of cartilaginous tissue, which is like osseous tissue, except it is more flexible. The absence of calcium salts in its intercellular spaces makes it less dense. As development continues, the process of the depositing of calcium salts into the cartilaginous tissue occurs, and continues throughout their life. Ossification is the gradual replacement of cartilage and its intercellular substance by bone cells that are immature, and calcium deposits.
• What are the roles of Osteoclasts and bone formation? Osteoclasts are large cells that have the function of reabsorbing bony tissue. They digest bone tissue from the inner sides of bones, which enlarges the
…show more content…
Osteoblasts are osteocytes that are immature. They produce bony tissue to replace cartilage during ossification. The formation of bone relies on the proper nutrients such as, calcium, phosphorus, as well as proper amounts of, vitamin D. Then osteoblastic activity makes an enzyme that forms calcium phosphate, to give the bone its hard quality.
• How does vitamin D support bone formation? Bones require a proper amount of vitamin D to support bone formation. Vitamin D helps calcium to be absorbed through the lining of the small intestine to the bloodstream. By helping with absorption, then the body is able to form new bone.
• Explain the difference between long bones, short bones, flat bones, and sesamoid bones. Long bones are found in the thigh, lower leg, and upper and lower arm. These bones are broad at the ends where they join at the ends to other bones, and they are very strong. Long bones have large areas for muscles to attach. Short bones are found in the wrist and ankle. They are small and irregular shaped. Flat bones are found covering soft parts of the body. Sesamoid bones are found near joints. They help with the efficiency of muscles that a near a certain joint. The kneecap is the largest example of a sesamoid
…show more content…
The spinal column has 26 segments of bones, called vertebrae. Vertebrae are in sets that are divided into four curves. Starting from the skull, C-1 to C-7 vertebrae form the cervical curve, they do not join the ribs. The second set, consists of twelve vertebrae. They are known as the thoracic vertebrae, T-1 to T-12. These vertebrae join with the ribs. The third set is known as the lumbar vertebrae, L1-L-5. The lumbar vertebra is the largest and strongest of the vertebrae, and is not joined with the ribs. The last curve of the vertebrae is the sacral curve (sacrum). It is formed with five separate bones that fuse together in a young child. It is a slight curved, triangular shaped bone in an adult.
• Describe the location of the coccyx. The coccyx is located and the end of the backbone. The coccyx, or tailbone, is also a fused bone. It is formed from four small coccygeal bones
• Describe the difference between the metacarpals and the metatarsal bones. Metacarpal bones are in the hand. They consist of five bones, and are in the palm. Metatarsal bones are located in the midfoot. They are five bones that make up the metatarsal bones. The difference between the two is that the metatarsal bones are longer, and flatter, than the metacarpal bones. Each set of bones are similar, where each has five bones, and each articulates with the

Related Documents