Crevo_(zoologija)
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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, čmar, 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]
Izvori
- ↑ Ruppert, E.E., Fox, R.S., and Barnes, R.D. (2004). „Introduction to Eumetazoa”. Invertebrate Zoology (7 izd.). Brooks / Cole. str. 99–103. ISBN 0030259827.
- ↑ Ruppert, E.E., Fox, R.S., and Barnes, R.D. (2004). „Introduction to Bilateria”. Invertebrate Zoology (7 izd.). Brooks / Cole. str. 203–205. ISBN 0030259827.