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प्रश्न
Explain in your own words with suitable examples.
How does excretion occur in human beings?
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उत्तर
- The excretory system removes wastes from the body, which is an important function.
- The human excretory system is made up of two kidneys, two ureters, the urine bladder, and the urethra. The kidneys produce urine by removing waste and undesirable chemicals from the bloodstream.
- Nephrons are the functional units of the kidney that perform the basic function of filtration. The urea generated in the liver enters the bloodstream.
- When urea-containing blood enters the glomerulus, it is filtered by capillaries, removing urea and other related compounds.
- Water molecules and tiny molecules of other substances can pass through the semipermeable membrane of Bowman's capsule.
- The fluid that has accumulated in the Bowman's capsule cavity enters the nephron's tubular portion. Here, water molecules and other important compounds are reabsorbed into the bloodstream.
- Urine is generated from the residual fluid, which contains waste elements. The ureters carry urine, which is then stored in the urinary bladder. Urine is then released through the urethra.
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संबंधित प्रश्न
What is the function of excretory system in humans?
Where is urine carried through ureters?
The excretory organs in an earthworm are:
(a) nephridia
(b) nephrons
(c) raphides
(d) ureters
Differentiate between the following pairs of term :
Renal cortex and renal medulla
Define the following term :
Renal pelvis
Define the following term:
Osmoregulation
Choose the correct answer:
Narrow apex of pyramid in kidney is called ___________
The following diagram represents a mammalian kidney tubule (nephron) and its blood supply.
Parts indicated by the guidelines 1to 8 are as follows:
1. Afferent arteriole from renal artery
2. Efferent arteriole
3. Bowman's capsule
4. Glomerulus
5. Proximal convoluted tubule with blood capillaries
6. Distal convoluted tubule with blood capillaries
7. Collecting tubule
8. U-shaped loop of Henle
Study the diagram and answer the question that follow:
Which structure contains the highest concentration of urea?
Given below is a highly simplified diagram of the human kidney cut open longitudinally. Answer the question that follow:
Name the functional units of the kidneys.
Give Technical Term:
The duct which transports urine from the kidney to the urinary bladder.
Choose the correct option.
Which one of the following organisms excrete waste through nephridia?
Choose the correct option.
The minor calyx _______.
Choose the correct option.
The part of nephron which absorbs glucose and amino acid is ______.
Answer the following question.
Name any one guanotelic organism.
Answer the following question.
Amphibian tadpole can afford to be ammonotelic. Justify.
The CORRECT match is ______.
Among the following animals, the best conserver of water is ______.
If a plant is releasing carbon dioxide and taking in oxygen during the day, does it mean that there is no photosynthesis occurring? Justify your answer.
