Sketch and Label ‘L.S. of Human Kidney’ - Biology

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Sketch and label ‘L.S. of human kidney’

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2015-2016 (March)

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(b) Wastes dissolved in water are filtered out as urine in the kidneys.

(c) Urine stored in the urinary bladder is passed out through the urinary opening at the end of the urethra.

(d) Blood containing useful and harmful substances reaches the kidneys for filtration.

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The bunch of capillaries inside the Bowman’s capsule.


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Kidneys are vital organs for survival. Several factors like infections, injury or restricted blood flow to kidneys reduce the activity of kidneys. This leads to the accumulation of poisonous wastes in the body, which can even lead to death. In case of kidney failure, an artificial kidney can be used. An artificial kidney is a device to remove waste products from the blood through dialysis.

i. a. Name the artery that brings oxygenated blood to the kidney.

b. Name the cluster of the thin-walled blood capillaries present in the Bowman's capsule.

ii. In the human excretory system, name the organ which stores urine. Is this organ under hormonal control or nervous control?

iii. List two major steps involved in the formation of urine and state in brief their functions.

OR

iii. In which part of the nephron does selective reabsorption take place? List the factors which the amount of water reabsorbed depends on.


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