Rabu, 23 November 2011
Frog
Frog life cycle in the form of changes or metamorfosis. At the time a young tadpole and adult life in the land. At nula with gill breathing tadpole that is outside on the back of the head. Gill always vibrates in the water around the gill always change. Terlarut the oxygen in the water berdifusi in the capillary blood vessel in the gill.
After some time outside the gill is a gill akan change in the way terbentuknya skin fold from the front to the back of the gill cover so that the outside. Adult frog lives on land, with pernapasannya lungs. In addition to the lungs, oxygen can berdifusi in the mouth cavity through the peritoneal cavity through the mouth and skin.
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