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प्रश्न
Explain the difference between the excretory system of humans and plants.
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उत्तर
| Excretory system in humans | Excretory system in plants |
| Humans have a well-developed excretory system for the elimination of nitrogenous wastes. | Plants do not have a well-developed excretory system for the elimination of nitrogenous wastes. |
| The human excretory system comprises the kidneys, blood vessels that join them, ureters, urinary bladder, and urethra. | Plants use different strategies for excretion. |
| Excretion is in the form of urine produced to filter out the waste products, like urea and uric acid, from the blood. | Excretion is by means of tannins, gums, essential oils, etc stored in special cells. |
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संबंधित प्रश्न
Give biological reasons for the following statements: There is frequent urination in winter than in summer
The form in which glucose in stored in liver.
The given diagram represents a nephron and its blood supply. Study the diagram and answer the following questions:
(i) Label parts 1, 2, 3 and 4.
(ii) State the reason for the high hydrostatic pressure in the glomerulus.
(iii) Name the blood vessel which contains the least amount of urea in this diagram.
(iv) Name the two main stages of urine formation.
(v) Name the part of the nephron which lies in the renal medulla.
Write the functions of the Urinary bladder
Differentiate between the following pair on the basis of what is indicated in the bracket.
Ureter and Urethra [function]
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What is the name of the tubes which connect the kidneys to bladder?
A dialysis machine contains long tubes coiled in a tank containing dialysing solution:
Of what substance are the tubes made?
Where is urine carried through ureters?
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The organs A of a person have been damaged completely due to which too much of a poisonous waste material B has started accumulating in his blood, making it dirty. In order to save this person’s life, the blood from an artery in the person’s arm is made to flow into long tubes made of substance E which are kept in coiled form in a tank containing solution F. This solution contains three materials G, H and I in similar proportions to those in normal blood. As the person’s blood passes through long tubes of substance E, most of the wastes present in it go into solution. The clean blood is then put back into a vein in the arm of the person for circulation. |
- What are organs A?
- Name the waste substance B.
- What are (i) E, and (ii) F?
- Name G, H and I.
- What is the process described above known as?
Why is excretion necessary in living beings?
Name the following:
The part of kidney tubules where the term urine is first used for the fluid in it.
Why is it necessary to maintain a normal osmotic concentration of the blood?
Fill in the blanks in the following passage to make it a meaningful description.
In a nephron, the ______ flows through the ______ under great pressure. The reason for this great pressure is that the ______ (outgoing) ______ is narrower than the ______ (incoming). This high pressure causes the ______ part of the blood to filter out from the ______ into the ______ capsule.
Define the following term:
Micturition
Explain in your own words with suitable examples.
How is excretion in plants useful to human beings?
Name the Following
The process by which kidneys regulate the water content of the body.
Name the Following
The substance found in excess in the urine of a diabetic patient.
Identify the INCORRECT match.
In order to maintain homeostasis or constant internal environment . ______' is essential.
