Crevo
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U zoologiji, crevo, takođe poznato kao alimentarni kanal ili alimentarni trakt, je cev kojom bilateralne životinje prenose hranu do organa za varenje.[1] Kod velikih bilateralnih životinja crevo generalno ima izlaz, anus, putem koga životinja odstranjuje čvrsti otpad. Taj proces je defekacija. Male bilateralne životinje često nemaju čmar, i one odstranjuju čvrsti otpad na neki drugi način, na primer kroz usta.[2]
Reference
- ^ Ruppert, E.E.; Fox, R.S.; Barnes, R.D. (2004). „Introduction to Eumetazoa”. Invertebrate Zoology (VII izd.). Brooks / Cole. str. 99—103. ISBN 0-03-025982-7.
- ^ Ruppert, E.E.; Fox, R.S.; Barnes, R.D. (2004). „Introduction to Bilateria”. Invertebrate Zoology (VII izd.). Brooks / Cole. str. 203—205. ISBN 0-03-025982-7.
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