This is muscular tube that connects the mouth to the sac.

The enzyme allows cows to digest grass.

An Amoeba uses this process in order to get food and nutrients.

This organ perform the essential function of removing waste products from the blood and regulating the water fluid levels.

This is the functional unit of the kidney.

This is where insulin is created, which is then secreted into the bloodstream.

This is an appetite suppressant.

When a cow eats, it regurgitates its food to form this.

This organ is a hollow and muscular chamber that can collect and store urine.

This condition, the inability to digest a sugar found in milk, is the primary cause of inflammatory bowel disease, which occurs in the colon and small intestine.

This is where nutrients are absorbed from the small intestine and is considered the body's "chemical factory"

This is an appetite stimulant.

Microbes are housed in this part of the bird's digestive system.

These are the two veins that are in the kidney where blood enters and exits.

This is the enzyme secreted by and stored in the kidneys that promotes the production of the protein angiotensin and that is released into the bloodstream.

These structures increase the surface area in the small intestines in order to help the absorption of nutrients.

This enzyme denatures proteins in the stomach.

A bird's teeth are made out of this protein.

This is where urine forms in the outermost layer of each kidney.

This is the name of the condition where the sphincters do not work properly and stomach juice and contents splash up to the esophagus. A common symptom of this condition is heartburn.

These are smooth ringed muscles that pace digestion.

This enzyme not only breaks down food, but it also acts as a non specific defender against bacteria and viruses.

This is the Cnidarian's version of a stomach.

This create a concentration gradient in the medulla of the kidney (in other words, is to reabsorb water and important nutrients in the filtrate).

This is the 4th and final stomach in a cow and where rennin, used in cheese creation, is secreted.