Answer the following question given this paragraph: 

Kidneys: The Main Osmoregulatory Organ The kidneys, illustrated in Figure 41.4, are a pair of bean-shaped structures that are located just below and posterior to the liver in the peritoneal cavity. The adrenal glands sit on top of each kidney and are also called the suprarenal glands. Kidneys filter blood and purify it. All the blood in the human body is filtered many times a day by the kidneys; these organs use up almost 25 percent of the oxygen absorbed through the lungs to perform this function. Oxygen allows the kidney cells to efficiently manufacture chemical energy in the form of ATP through aerobic respiration. The filtrate coming out of the kidneys is called urine.


Q: The kidneys are a pair of bean-shaped structures that are located just below and posterior to the liver in this?

 Choices:

- stomach cavity

- cerebral cavity

- mantle cavity

- peritoneal cavity

A:
peritoneal cavity
