Final answer:
The kidneys are the organs responsible for removing metabolic waste by filtering blood plasma and turning it into urine. They contain nephrons that do the actual filtering. The correct answer to the question is 'c. kidney'.
Step-by-step explanation:
The organ that functions to remove metabolic waste material by filtering blood plasma is the kidneys. The kidneys are part of the excretory system and play a critical role in maintaining the body's internal environment. They do this by filtering out waste products, regulating water balance, and maintaining the pH of body fluids.
Each kidney contains over a million nephrons, which are the functional units responsible for filtering the blood. All the blood in the human body is filtered approximately 60 times a day by these nephrons. The wastes are then concentrated and turned into urine, which is collected in the bladder and eventually excreted from the body.
Other organs involved in excretion include the skin, liver, lungs, and large intestine, but they do not filter blood plasma. The bladder, while involved in storing urine until it is released from the body, does not filter the blood. Therefore, the correct answer to the question is 'c. kidney'.