Question

describe the structure and functioning of nephrons​

Answer 1

Explanation:

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Answer 2

Answer:

Explanation:

Structure of Nephron :

Nephron is the structural and functional unit of kidney. It consists of a long coiled tubule differentiated into proximal tubule. The distal tubule opens into the collecting tubule. At the proximal end of the Nephron Lise a double walled cup- shaped structure called Bowman's capsule. The Bowman's capsule contains a bundle of blood cappilaries which is called Glomerulus. In the Glomerulus, the blood that comes in through different arteriole is drained out through different arteriole.

Functions of Nephron :

⬛ FILTRATION :

Filtration of blood takes place in Bowman's Capsule from the cappilaries of Glomerulus. This takes place under high pressure. The filtrate passes into the tubular part of the Nephron. It contains glucose, amino acids, uria, uric acid, salt and major amount of water.

⬛ Re- absorption :

As the filtrate flows along the tubule useful substances such as glucose ,amino acid, salt and water are selectively re - absorbed into the blood by cappilaries surrounding the Nephron tubule.

⬛ Tubular secretion :

Certain substance which are harmful and not needed by the body like ammonia, pottasium, and hydrogen ions are secreted from the cappilary blood into the lumen of distill tubule. This is called tubular secretion.