The layers of the alimentary tube wall are mucosa, submucosa, muscularis externa, and serosa.
mucosa-submucosa-muscularis externa-serosa
external cells
Surface Tension
Lungs
Water is evaporated from the external layer of water.
integumentary system
The correct spelling is external (on the outside, on an outer surface).
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external cells
Radiological material physically attached to an external surface (person)
Surface Tension
Radiological material physically attached to an external surface (person)
External processes affect the surface of the Earth and include flooding.
processes which bring about changes on the surface of the earth are called external processes.
ectoparasites
without, outside, exterior, external, surface
Lungs
An epithelium always has on surface where the cells are exposed either to the external environment or to an internal passageway or cavity; this surface is called the free surface of the epithelium.