Q18 of 45 Page 177

After being taught about respiration in living organisms, aditi got confused as to how organisms like earthworm respire. As these organisms lack any special organs for respiration and breathing.

(i) How does earthworm respire when no specialised system is present in them?


(ii) Mention the major function of respiratory pigment.


(iii) What values do you observe in Aditi?

(i) Earthworms do not have any specialised organ for respiration. Instead they respire through their moist skin.



(ii) Respiratory pigments play a very important role in the body of an organism. It helps in the transportation of respiratory gases to the various body organs.


(iii) Aditi is a keen observer. She applied her academic knowledge which she has gained from her books into practical life which is very good.


More from this chapter

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16

If a person holds his breath after expiration for about 25 sec, would there be occurrence of any exchange of respiratory gases in the lungs during this period? Explain.

 17

Raman kept a plant in his room. Adequate light was provided and the plant was extensively watered. Instead of flourishing the plant died. Raman asked his teacher for an explanation for the same.

Read the passage and answer the following questions.


(i) Even though the plant was watered, it soon died. Give reason.


(ii) How do plants respire? Name the organelle responsible for gaseous exchange in


(a) Herbaceous plants


(b) Woody plants


(iii) What values does Raman have in your opinion?

 1

Which process occurring in human body does not involve energy from respiration?

 2

Assertion (A) In the day time, CO2 generated during respiration is used up for photosynthesis.

Reason (R) There is no CO2 release during day.