There are three body views (front, back and side) that may be helpful if you are uncertain of a body area. Many areas are referred to by both descriptive and technical names. For example, the back of the knee is called the popliteal fossa. However, areas like the "flank" may not have both names, so the location may be unclear.

The esophagus, stomach, large and small intestine, aided by the liver, gallbladder and pancreas convert the nutritive components of food into energy and break down the non-nutritive components into waste to be excreted.

The process of digesting food is accomplished by many organs in the body. Food is pushed by the esophagus into the stomach. The stomach mixes the food and begins the breakdown of proteins. The stomach propels the food then into the small intestine. The small intestine further digests food and begins the absorption of nutrients. Secretions from the pancreas in the small intestine help neutralize the acid in the intestine to provide a proper environment for the enzymes to function. Bile from the gallbladder and liver emulsify fat and enhance the absorption of fatty acids. The large intestine temporarily stores and concentrates the remainder until it is passed out as waste from the body.

Since the abdominal area contains many different organs it is divided in smaller areas. One division method, uses one median sagittal plane and one transverse plane that passes through the umbilicus at right angles. This method divides the abdomen into four quadrants. Medical personnel can easily refer to these quadrants when describing pain or injury regarding a victim.

The appendix is a small finger-shaped tube that branches off the first part of the large intestine. The appendix can become inflamed or infected causing pain in the lower right part of the abdomen.

Blood from the aorta reaches the kidneys so it can be filtered and cleaned. Among other functions, the kidneys remove toxins, metabolic waste, and excess ions from the blood which leaves the body in the form of urine.