Cardiovascular Lab Essay

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1. Describe in detail the CLOTTING process. When blood vessels become damaged, you bleed and blood fills the wound, the blood vessels constrict and blood flow slows down. Exposed collagen fibers begin the clotting process, and then platelets in the blood stick to collagen fibers that make up the vessel wall, which acts as a plug. Platelets then release chemicals to attract more platelets, which eventually forms a platelet plug and stops the external bleeding. The clotting factors then form around the platelets and causes fibrin to stick together and seal the wound. When the cut vessel heals the clot dissolves after several days. 2. Describe in detail the transportation of an oxygen molecule found in air as it enters the human body and is exchanged for carbon dioxide. Describe how carbon dioxide leaves the cells and finally exits the body. Air enters the body through the mouth or nose and enters the pharynx, to the larynx and eventually the trachea. From the trachea it enters the lungs, which branches to a left and right bronchus, then divide into smaller branches called bronchiole. Bronchiole’s have small air sac called alveoli attached to them, which inflate during inhalation and deflate during exhalation. Gas exchange delivers the oxygen from the lungs to the bloodstream, and the elimination of carbon dioxide from the bloodstream to the lungs. Capillaries lie within the walls of the alveoli which make it possible to diffuse the oxygen and carbon dioxide between the alveolus and capillary. The oxygen attaches in blood vessels and carbon dioxide is eliminated during exhalation. 3. How does Rhogam prevent erythroblastosisfetalis (HDN hemolytic disease of the newborn)?. Rhogam is human antibody to the Rh antigen, the binds and lead to the destruction of fetal Rh D positive red blood cells that have passed from the fetal circulation to the maternal

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