Rabu, 23 November 2011
Fish
Gold fish with gill breathing in the left and right side head. Each have four closed gill by gill cover (operkulum). Respiratory process in fish is a way to open and close the mouth alternately with opening and closing the gill cover. At the time the mouth opens, the water into the mouth cavity while closing the gill cover. Terlarut the oxygen in the water to enter berdifusi in capillary blood vessel in the gill. And at the time of close, close the gill opening and the water out of the mouth cavity through the gill. Together with the discharge of water through the gill, carbon dioxide is removed. Exchange of oxygen and carbon dioxide occurs in the gill sheet.
Insects have sitem respiratory system called trakea. Oxygen needed by the body's cells to oxidation is not distributed by blood but distributed by the trakea ramify throughout the body. Small branches that penetrate the network trakea body called trakeolus. Respiratory air to the entrance through the mouth but not through the stigma (spirakel).
Respiratory process in the insect occur as follows. With the contraction of the body musculature, the insect's body and into the mengempis regularly. In the body of the insect, the air entering through the stigma, to the next entry in trakea, and then into trakeolus and finally into the body cells. Berdifusi oxygen to cells in the body. Carbon dioxide is removed through the respiratory system trakea also issued through the end stigma at the time of insect bodies deflated.
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