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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.
APPEARS IN
संबंधित प्रश्न
State the exact location of the Loop of Henle.
Write the functions of the Urinary bladder
The diagram given below is that of a structure present in a human kidney.
Study the same and answer the questions that follow:
1) Name the structure represented in the diagram
2) What is the liquid entering part ‘1’ called?
Name two substances present in this liquid that are reabsorbed in the tubule.
3) What is the fluid that comes to part ‘2’ called?
Name the main nitrogenous waste in it.
4) Mention the three main steps involved in the formation of the fluid mentioned in (iii) above
5) Name the substance which may be present in the fluid in part ‘2’ if a person suffers from Diabetes mellitus.
What is the name of the tubes which connect the kidneys to bladder?
Define the following term :
Renal pelvis
Define the following term:
Osmoregulation
Look at the figure given bellow, it is a section of human kidney as seen from the front.
Is it a longitudinal section or a cross-section?
Differentiate between:
The Renal artery and the Renal vein.
Study the diagram given below and then answer the questions that follow:
 |
- Name the region in the kidney where the above structure is present?
- Name the parts labelled 1, 2, 3 and 4.
- Name the stages involved in the formation of urine.
- What is the technical term given to the process occurring in 2 and 3? Briefly describe the process.
Name the Following
The term used for Bowman’s capsule and glomerulus together.
Name the Following
The blood vessels which brings pure blood to the kidneys:
Give Technical Terms
The hormone that helps increase the reabsorption of water from the kidney tubules.
Write the functional activity of the following structure: Nephron
Choose the correct option.
In human beings, uric acid is formed due to metabolism of ______.
Answer the following question.
Birds are uricotelic in nature. Give reason.
Certain organisms that are aquatic in habitat, tolerate only a narrow range of salinity. What term is given to such animals?
Name the following:
The main nitrogenous waste formed in the body.
The process of removal of unwanted metabolic wastes from the body is called ______.
