BIO325H5 Lecture Notes - Lecture 2: Short-Chain Fatty Acid, Rumen, Quokka
Document Summary
Food is ingested (while exposed to prairie/savannah predators) and swallowed quickly into the rumen. The rumen houses micro-organisms --bacteria, ciliate protozoa, fungi with the capacity to make cellulases. Some nutrient absorption does occur in the rumen via the epithelium of the papillae in its walls. In the rumen micro-organisms digest the carbohydrates of plant cell walls. Carbohydrates both structural (cellulose cell walls) and sugars and starches, when they undergo microbial fermentation produce volatile fatty acids (vfa): e. g. , acetic, propionic, butyric etc. It then treats the bacterial" protein in a more. Normal" nonruminantfashion: absorption within the small intestine: adaptations need to be studied in the context of animal behaviourand ecology; they occur within adaptive systems" as a groupof adaptations. An example of homoplasy[convergence]: independent adaptation in different lineages, resulting from similar selection processes (think also bat hairs and bee hairs): stomach diagram illustrates the basis of the oesophagealgroove of a wallaby.
