Question

Malpighian body is present in
A) Skin
B) Kidney
C) Testes
D) Ovaries

Answer 1

Malpighian tubules are types of excretory and osmoregulatory systems frequently observed in case of insects, arachnids, myriapods, and tardigrades.

Complete answer:
Malpighian tubules are slender and normally present within the posterior regions of the alimentary canals of the arthropods. Every tubule contains a single cell layer at its distal end wherein its proximal end connects the alimentary canal with the junction between the hindgut and the midgut. Most of the tubules are highly convoluted.
Option A: Skin is composed of epidermis and dermis only and it does not have a malpighian body. Therefore, this is the incorrect option.
Option B: Pre-urine formation takes place within the tubules when both the electrolytes and the nitrogenous wastes are transported across the tubule walls. Wastes such as amino acids and urea diffuse through the walls while ions such as potassium and sodium transport by the mechanisms of the active pump. These are present within the human kidneys. Therefore, this is the correct option.
Option C: Testis is composed of seminiferous tubules and leydig cells and it does not have a malpighian body. Therefore, this is the incorrect option.
Option D: Ovary is made up of cortex and medulla and it does not have a malpighian body. Therefore, this is the incorrect option.
Thus, the correct option for the given question is Option B i.e. Kidneys.
Note: The Malpighian tubules play a contributing role in the blood filtering process at high pressure. In insects, they help in excretion of nitrogenous wastes and metabolic wastes.