Question

Why gall is absent in rat and horse

Answer 1

Rats: This bile as it comes from the liver is but one-eighth as strong at least in pigment as rat bile, but the concentrating activity of the gall bladder is so great that the products yielded to the intestine may become not dissimilar.

Horse: Our gallbladder serves as a storage pouch for bile – the emulsifying agent produced by the liver that is needed to start fat digestion. When we eat a large amount of fat at one time, the gallbladder releases bile into the small intestine to aid in digestion. ... However, the horse's liver has the ability to compensate.