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17 terms

Comparitive gross anatomy of GIT systems in animals

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what is autoenzymic digestion?
carried out by enzymes in the GIT of animal
what is alloenzymic digestion?
carried out partly by gut microbres
what animals use autoenzymic digestion?
mammals and avian species
what animals use alloenzymic digestion?
foregut fermenters (ruminants/ non-ruminants)
hindgut fermenters
dental adaptations of carnivores
canines for tearing
molars for crushing bones
dental adaptations of omnivores
incisors and canines- piercing and tearing
molars- grinding
dental adaptations of non-ruminant herbivores
incisors for nipping
molars slightly angled, jaws move circularly
dental adaptations of ruminants
upper incisors absent (dental pad instead)
canines absent
lateral jaw movements
molars present for shredding and grinding fibre
what is prehension?
grasping and conveying feed to mouth
what are edentates?
relatively toothless animals e.g sloths, armadillos, anteater
tend to have long tongue
may have ridges and spines in mouth
components of the digestive system of ruminants
rumen (1st stomach)
reticulum (2nd stomach)
omasum (3rd stomach)
abomasum
what is the texture of the rumen?
towel like surface
what is the texture of the reticulum?
honey comb
what is the texture of the omasum?
book-like structure
list the three types of feeding strategies of ruminants
concentrate selectors, intermediate feeders and bulk roughage grazers
what are the features of concentrate selectors?
small rumen, poorly developed omasum
large liver
limited fibre digestion ability
tree & shrub browsers
what are the features of intermediate feeders?
seasonally adaptive
browsers
grazers