No it bodily waste
No. It's "waste."
Faeces is made up of waste materials and mucus as much as 75% is water based.
it is the large intestine
Feces technically is not stored, it is held in the Descending Colon until its is ready to be expelled.
Cows are quite efficient at breaking down coarse roughage into tiny pieces and that a lot of water is involved in digesting them. Because of that these tiny pieces compile into sloppy cow-patties.
the anus
Large intestine
the colon
It could be any number of things from worms, to infection, to organ failure. If your cat has blood in its feces, take it to the vet immediately.
Human feces (or stools) are produced by the entire digestive system.
Feces is stored in the colon until defectation occurs. The more proximal portions of the colon also serve to absorb water from the feces. The rectum, which is the more distal portion of the colon, serves primarily to store feces pending defecation and is probably the answer you are looking for.
The organ at the end of the digestive tract is the rectum. It's job is to hold feces inside until you defecate. Or basically, have a poo. :)