Question

Accessory excretory human organ is
A. Skin
B. Skin and liver
C. Skin and lungs
D. Skin, lungs, liver and intestine

Answer 1

Hint: It is common that every organism produces waste in the human body and there is some mechanism to expel them out, so that body can maintain some homeostasis, the major excretory organs are kidneys, and apart from them there so many parts which also do the excretion.

Complete answer:
In addition to the kidneys and urinary system, the body contains other excretory organs which include skin, liver, lungs, etc.
Skin: skin mainly consists of two glands namely, sweat glands and sebaceous glands, sweat glands produce sweat while the sebaceous glands produce sebum.
Sweat is a water-like substance which is excreted out from the body through the skin, it contains so many substances like water, sodium chlorides, glucose, urea, etc
Whereas sebum is a wax-like coating which excretes fats, and some other salts
Lungs: Lungs are also considered as one of the accessory excretory organs because they help in the elimination of carbon dioxide from the body and maintain the homeostasis, but if the lungs fail to eliminate the carbon dioxide produced from in the body, then. Kidneys convert some of the carbon dioxides to the sodium bicarbonate and maintain the balance.
Liver and intestine: They also play an important role as excretory organs where they break down many waste products in the body and it also form the bilirubin which is the byproduct of hemoglobin catabolism, and from it is enters to small intestine and finally to outside.

Note:
Though these organs participate in the excretion, we can’t say these as excretory organs as they do not belong to this tract, these come under accessory glands as they are doing some part of this function, even though they belong to other tract.