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प्रश्न
Why is it necessary to excrete waste products?
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उत्तर
- Certain waste and toxic products are formed during the functioning of body cells. Waste products like urea are toxic.
- When these toxic materials are not removed from the body, they get mixed with blood and can damage the cells of the body.
- It is necessary to remove such poisonous waste materials from our bodies.
- Some harmful substances are produced in the body as part of biological processes. It is very important to remove them from the body, otherwise poison will be produced in the body which can lead to death.
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संबंधित प्रश्न
How are waste products excreted in Amoeba?
Draw a neat labelled diagram of the human excretory system.
The excretory unit in the human excretory system is called:
Define the following term:
Osmoregulation
Choose the odd one out in the following series:
Renal fat, renal capsule, nerve.
Look at the figure given below. It is a section of human kidney as seen from the front.
Which area/part (give its name and number given on the diagram) which contains the following:
(i) Malpighian capsule
(ii) The pyramids
(iii) Freshly collected urine
The diagram below represents a mammalian kidney tubule (nephron) and its blood supply. Parts indicated by the guidelines 1 to 8 are as follows:
1. U-shaped loop of Henle
2. Proximal convoluted tubule with blood capillaries
3. Bowman’s capsule
4. Afferent arteriole from the renal artery
5. Glomerulus
6. Venule to the renal vein
7. Collecting tubule
8. Distal convoluted tubule with blood capillaries Study the diagram and answer the following questions in each case:
(i) Where does ultrafiltration take place?
(ii) Which structure contains the lowest concentration of urea?
(iii) Which structure contains the highest concentration of urea?
(iv) Which structure contains the lowest concentration of glucose?
(v) Where is the most water reabsorbed?
In order to maintain homeostasis or constant internal environment . ______' is essential.
Why is the rate of breathing in aquatic organisms much faster than in terrestrial organisms?
The statement given below is false. Rewrite the correct form of the statement by changing the underlined word.
The pigment urochrome is the breakdown product of the haemoglobin of dead RBCs.
