Question

The kidneys in human beings are a part of the system for
(b) Respiration. (C) Excretion.
(d) Transportation
(a) Nutrition.​

Answer 1

Answer:

Kidney is part of Excretion process

Kidneys filter the blood

Answer 2

Answer:

(C) Excretion

Explanation:

Kidneys are the bean shaped reddish brown paired organs that serve in maintaining the fluid electrolyte balance and acid base balance of body through the process of urine formation. Excretion refers to removal of metabolic waste from body. This makes kidneys part of excretory system