Stratified ciliated columnar epithelium
An epithelium consisting of several layers of cells with the deeper cells being polyhedral in form and the surface ones columnar with motile cilia, such as that which lines the foetal oesophagus.
Animals adapt to their environment in aspects of anatomy, physiology, and behavior. This tutorial will help you understa..
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The water cycle (also referred to as the hydrological cycle) is a system of continuous transfer of water from the air, s..
Adaptation, in biology and ecology, refers to the process or trait through which organisms or the populations in a habit..
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This tutorial digs into the past to investigate the origins of life. The section is split into geological periods in the..