ESSAYS Flashcards
The development of the blood vessels involves enlargement and degeneration. Defend.
Yes. During the formation of the blood vessels, angiogenesis occurs, where new blood vessels grow from pre-existing blood vessels. Angiogenesis involves the enlargement of endothelial cells, which line the inside of the blood vessel. When blood vessels are formed, they undergo degeneration in the process angiogenesis regression, where the blood vessels are no longer needed or are damaged hence, they shrink and eventually degenerate. This processes where the blood vessels enlarge and degenerate are vital in the development and maintenance of the circulatory system.
What is the goal of Nasovascular moulding (NAM)?
The goal of NAM treatment is to reduce the severity of cleft prior to lip surgery by closing the gap between the lips and gums and improving the symmetry of the nose. Where surgeons are able to repair the lip easier resulting in a smaller scar with less tension in on the lip having a better result of the operation.
What is autotomy in starfish? Describe its importance in reproduction of the starfish.
Autotomy is the process where a starfish would shed off a part of its body as a defense mechanism.
Since starfish has the ability to regenerate, during reproduction of seastar, they undergo autotomy to intentionally detach one of their arms which will regenerate into a new individual as an asexual process of reproduction.
Differentiate epiphysis and diaphysis.
The diaphysis is the long central portion of the bone. It is cylindrical in shape and primarily composed of compact bone tissue, which provides strength and support to the bone.
The epiphysis is the rounded end of the bone that articulates with another bone to form a joint. The epiphysis is mainly composed of spongy or cancellous bone tissue, which has a porous and lattice-like structure. The articular cartilage provides a smooth and cushioned surface for the bones to move against each other.
During embryonic development, both the diaphysis and epiphysis begin as cartilage models, which later ossify or turn into bone tissue.
Overall, the development of the epiphysis and diaphysis involves the gradual ossification of cartilage models into bone tissue through the process of endochondral or intramembranous ossification, resulting in the distinct regions of the long bone as seen in adults.
