The number of uriniferous tubules in each kidney of man is

The correct option is D About 1.0 x 10${}^6$

The excretory organ present in humans is called a kidney. The nephrons are the structural and functional units of the kidney. Nephrons are also called as uriniferous tubules. The body of the uriniferous tubule is composed of Renal corpuscle, Proximal convoluted tubule(PCT) Henle's loop and Distal convoluted tubule(DCT) and collecting duct. The number of uriniferous tubules in each kidney of man is about 1.0 x 1000000.

So, the correct answer is 'Option D'.