A scientist with more than 20 years of experience helps explain the digestive systems of cattle, sheep, deer and goats. Begin with an overview of prehension, salivation, mastication and rumination. Then, briefly review anatomy: the rumen, reticulum, omasum, abomasum and lower digestive tract. Dissect the digestive track from a 1,000-pound steer, show and explain organ structures, contents, tissue textures, functions and capacities. You will see two amazing feats of science: a cannula placed in a live steer to examine stomach contents while the steer is digesting and laparoscopic footage filmed from inside the digestive track. A supplement is included.