There must be some bleeding somewhere in the colon for you to see this. It could be a hemorrhoid.
Difficult, delayed elimination of feces is known as constipation.
in the rectum
An involuntary response for elimination of feces may be diarrhea. This can happen as a result of illness, side effect of medication or a reaction to food or liquids ingested by the body.
Defecation or elimination is the process of removing undigested food (feces) from the body.
This occurs in the sigmoid colon via reabsoption of water, thus solidifying (consolidating) the feces.
feces is the material passes through the body at the end of he elimination stage.
before
Excretion is only the removal of cellular wastes, therefore faeces is not excretion, but elimination
anus or anal canal
Before elimination, if the cat gets too little fluid, they can be constipated with hard stool.After elimination, air evaporates water content from feces. This dries the waste.
Large Intestine
Blood in the feces is not a specific disease - it is a symptom that can indicate any of several diseases. In younger dogs, blood in the feces is more likely to indicate either intestinal parasites or a gastrointestinal infection. In older dogs, the odds of cancer resulting in blood in the feces rises.