chapter 9: classification of digestive systems

how does the structure of the stomach and intestines differ between monogastric and ruminant HERBIVORES?

ruminant herbivore:

• complex stomachs with multiple compartments

• typically have long small intestines

nonruminant herbivore:

• simple stomachs

• have a large cecum and hindgut

do ruminants and monogastrics do pre- or post-gastric fermentation?

• ruminants: pre-gastric fermentation

• monogastrics: post-gastric fermentation

what affects how muscular a simple stomach is?

• the amount of chewing an animals does

• ex. dogs don’t chew their food much, so they have very muscular stomachs as opposed to kangaroos who have very pouch-like stomachs because they chew a lot

how does the size of the cecum vary among monogastrics?

herbivores typically have a larger cecum while carnivores have little to no cecum (because cecums are important for the fermentation of plant material)

what makes up the hindgut of a monogastric?

large intestine, cecum, colon, and rectum

what are the 4 sections of a ruminant stomach?

rumen, reticulum, omasum, abomasum

what is the “true stomach” of a ruminant?

the abomasum