11:067:330 Lecture 5: Nutrient Digestion
21 Jul 2017
School
Department
Course
Professor
Document Summary
Before eating, animal needs to get feed into its mouth prehension. Cows use their tongues to sweep feed into mouth and bring it back into the throat. Roll their tongues to both grab and move the feed to their mouths. Cow"s tongue is coarse: has barbed texture allows it to grab feed and pull it into its mouth. Sheep have incisors only on their bottom jaw and a hard palate on top enables them to snip off grass. Also have an upper lip split in the center (control the two sides almost independently) for selectivity. Chew in a grinding motion: jaw moves side to side and feed is ground with the molars. End of snout is flat and nostrils are in center. Rooting when a pig puts the flat portion of snout below surface of ground and runs forward. Sniff out feedstuffs (usually roots) and then dig them up and eat them.
