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I am giving the detailed idea about v.s. of kidney. I hope, it will help you....V. S. of Kidneys:
Each kidney consists of about 1 million nephrons. These are the structural and functional units of the kidneys. A notch present towards the centre of the inner concave surface of the kidney is called hilum. Through the hilum, the ureter, blood vessels and nerves enter the kidney. On the inside of the hilum, the renal pelvis is present. Renal pelvis has projections called calyces. There are two zones in kidneys, i.e. cortex (outer) and medulla (inner).
The main components of a nephron are the glomerulus, Bowman’s capsule, and a long renal tube. The blood enters the kidneys through the renal artery, which branches into many capillaries associated with the glomerulus. Water and solutes are transferred to the nephron at the Bowman’s capsule.
In the proximal tubule, some substances such as amino acids, glucose, and salts are selectively reabsorbed and unwanted molecules are added in the urine. The filtrate then moves down into the loop of Henle, in which more water is reabsorbed. From here, the filtrate moves upwards into the distal tubule, and finally to the collecting duct. This duct collects urine from many nephrons.
The urine formed in each kidney then enters a long tube called the ureter. The ureters move the urine from the kidneys to the urinary bladder. The urinary bladder is under the control of the nervous system. This helps us to control the urge to urinate.
Kidney is the organ of excretion of metabolic wastes produced in the cells and diffused into the blood.
Explanation:
To learn more:
1. Write any two causes that may damage the kidney of a person:
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2. Name some common disorders of kidney in man and explain in brief.:
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