GENERAL HISTOLOGY

Detailed explanation-1: -The excretory system is a passive biological system that removes excess, unnecessary materials from the body fluids of an organism. The kidney, the lungs, and the skin form the excretory system. They throw out the harmful or waste substances which the body does not need.

Detailed explanation-2: -Human excretory system has four parts namely kidneys, ureters, urinary bladder and urethra.

Detailed explanation-3: -Lungs are the primary organs of the respiratory system. Since they help in the elimination of carbon dioxide, they also form a part of the excretory system.

Detailed explanation-4: -Organs of excretion include the skin, liver, large intestine, lungs, and kidneys. All of them excrete wastes, and together they make up the excretory system . The skin plays a role in excretion through the production of sweat by sweat glands.

Detailed explanation-5: -The skin also acts as an excretory organ. It is estimated that 3 to 4 million eccrine sweat glands which together roughly weigh the same as one kidney (i.e., 100 g) are distributed over almost the entire human body surface.