Cats do not have appendix and humans do.
The human appendix (a small sac near the junction of the small and large intestine) is homologous to a structure called the "caecum", a large, blind chamber in which leaves and grasses are digested in many other mammals.http://scienceline.ucsb.edu/getkey.php?key=3246
The appendix.
In herbivores like horses and sheep, the appendix is called the "blind end" and apparently still does serve some function in digestion. I believe that cats and dogs to have an appendix, but it is not vermiform (long and skinny) like the human appendix; thus it may be less likely to get infected.
Humans
In humans the appendix is a vestigal organ and has no function that we are currently aware of.
destroy bacteria
Grass has cellulose, which humans do not have the bacteria to digest, like cows or horses do. You can eat it, but you can't really digest it for energy. Also, something about not having a working appendix.
yes No. In pigs, the cecum has a pouch that holds bacteria that aid in digestion. It is an active part of the digestive system. In humans, it has evolved into a vestigial appendix.
its the wishbone
The horse DOES NOT have an appendix. The equivalent organ in a horse is the CECUM, which serves as a fermentation vat for fiber in the digestive tract. As in humans, the cecum is part of the large intestine. Unlike the appendix, which is an appendage that can be removed (and is necessarily removed when infected), the cecum is an essential part of the horse's digestive tract.
Tailbones, tonsils, appendix,