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प्रश्न
Define excretion.
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उत्तर
Excretion is the process that biological organisms use to expel or eliminate the waste products produced by their metabolism.
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संबंधित प्रश्न
The diagram given below shows a section of human kidney. Study the diagram carefully and answer the questions that follow :
(i) Label the parts numbered 1 to 4.
(ii) Why does part ‘2’ have a striped appearance?
(iii) What is the fluid that passes down part ‘4’? Name the main nitrogenous waste present in it.
(iv) Mention the structural and functional units of kidneys.
(v) Name the two major steps in the formation of the fluid mentioned in Q.5 (a) (iii).
With which human organ system (or human systems) is glomerulus associated?
Describe the mechanism of urine formation in human excretory system. Draw a labelled diagram to illustrate your answer.
Put a tick mark (✓) against the most appropriate alternative in the following statement :
In human beings, urea is produced in :
Differentiate between
excretion and transpiration
Name the following:
The vein in which urea concentration is maximum
Given below is a highly simplified diagram of the human kidney cut open longitudinally. Answer the question that follow:
Why does the cortex of the kidney show a dotted appearance?
Name the Following
The substance found in excess in the urine of a diabetic patient.
Given below is a list of substances - select the ones that need to be eliminated from the body.
Glucose, excess water, amino acids, urea, carbon dioxide, excess common salt, glycogen, uric acid.
Give two examples of the following:
Main excretory organs
