Question

what is excretion how do unicellular organisms remove their ways to write two major components of human urine three name the structural and functional unit of kidney explain the two major steps involved in the formation of urine

Answer 1

execration is the process of removal of waste materia(nitrogenous waste and un wanted chemicals ) from body by the help of kidney.
nephrons are the main functional unit of kindney . nephron consist of bowmans capsule , tubular like struch , renal artery and renal vein etc.

Answer 2

The removal of toxic or harmful metabolic wastes from the body is called as excretion. The main excremory organs are kidney and skin.
Unicellular organisms like amoeba, paramecium excrete waste products in surrounding water by diffusion.
Two major units of human excretory system are kidney and skin.
Nephron is the structural and functional unit of kidney.
The blood is filtered in Bowman's capsule (glomerulus) by ultrafiltration. Then in the filtered waste, the water and nutrients is selectively reabsorbed and then urine is collected by collecting duct.