anus
anus In most animals, but not in coelenterates or Platyhelminthes, the exterior opening of the alimentary canal through which are expelled the unabsorbed remainder of food items, solid excretion products, and bacteria associated with both. In some aquatic invertebrates the posterior end of the alimentary canal is also used in respiration.
anus
a·nus / ˈānəs/ • n. Anat. & Zool. the opening at the end of the alimentary canal through which solid waste matter leaves the body.
anus
anus The terminal opening of the alimentary canal in most animals, through which indigestible material (faeces) is expelled.
anus
anus (ay-nŭs) n. the opening at the lower end of the alimentary canal, through which the faeces are discharged. It opens out from the anal canal and is guarded by two sphincters.
—anal adj.
—anal adj.
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alimentary canal
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