16. which excretory organ to control the water potential of the tissue
fluids?
(a) kidneys (b) skin (c) liver (a) lungs (e) ovary

The answer is a Kidneys

(A).Kidneys  is the correct option.

Explanation:

Kidneys are part of the urinary system, its function is to maintain fluid balance and to regulate and remove the minerals from the blood.

Kidneys control the water potential of the tissue fluids by maintaining the accurate amount of water and it removes the metabolic wastes, which help to maintain the composition of fluids present in the body.

The human body has two kidneys, which control the water potential, excess water is excreted through urine.

Blood through the renal artery is transported to the kidney, where it gets filtered, kidney reabsorbs the useful materials like glucose,water and ions. Once it is purified,it is transfer to the circulatory system and waste material such as salts, water and urea excreted in the form of urine which control the water potential.

Urine is produced by the kidney, by performing this process Kidneys control  the water potential of the tissue fluids.