The correct answer is: C. Kidney
The kidneys are two bean-shaped organs that filter waste products from the blood and produce urine. They also help to regulate blood pressure, produce red blood cells, and maintain a healthy balance of electrolytes in the body.
The lungs are two spongy organs that are located in the chest cavity. They are responsible for exchanging oxygen and carbon dioxide with the blood.
The heart is a muscular organ that pumps blood throughout the body.
The liver is a large organ that is located in the upper right abdomen. It is responsible for a variety of functions, including:
- Metabolizing nutrients
- Detoxifying the blood
- Producing bile
- Storing vitamins and minerals
- Regulating blood sugar levels
The kidneys are the only organs in the body that can filter waste products from the blood. The lungs, heart, and liver all play important roles in the body, but they do not purify blood.