Question

Explain the working of the urinary system in humans​

Answer 1

Answer:The working of the urinary system in humans is :-

Explanation:that how it works and its

Answer 2

There are three stages of urine production in humans:

(1) Ultrafiltration: The blood flows through the glomerulus under high pressure which is greater than in the capillaries elsewhere. The reason for this pressure is that the efferent arteriole is narrower than the afferent arteriole. This pressure, also called hydrostatic pressure, causes the liquid part of blood to filter out. This is known as ultrafiltration and the fluid entering the renal tubule thereafter, the glomerular filtrate.

(2) Reabsorption: The glomerular filtrate (containing glucose and some salts as those of sodium) passes down the renal tubule where much of the water is reabsorbed together with the useful substances. This is called selective absorption.

(3) Tubular secretion: Certain substances like potassium and a large number of foreign chemicals like drugs (eg: penicillin) are passed into the forming urine in the distal convoluted tubule. This passage is known as tubular secretion. The fluid left after reabsorption and tubular secretion is urine.

(4) Urine secretion: Finally, urine passes to the collecting ducts through the ureter into the urinary bladder. It is expelled from there through the urethra by the process called micturition.