The kidneys and sweat glands both work to prevent excesses of either uric acid or urine in the body. either water or salt in the body. either carbon dioxide or oxygen in the body. either feces or ph levels in the body.

Ans.

Kidneys and skin are two major organs of excretory system that help in elimination of waste substances from the body. Both the organs work to prevent excesses of salt and water in the body.

Kidneys make urine by filtering the blood and remove excess of fluid (water), some ions, salts and nitrogenous wastes. The skin consists sweat glands that secrete water as sweat, salts, urea onto the body.

Thus, the correct answer is option). 'either water or salt in the body.'

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.