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Unit - 4.1 Respiration — BIOLOGY STD 7 — Question

ICSE BoardEnglish MediumSTD 7BIOLOGYUnit - 4.1 Respiration2 Marks
Question
Define :
Breathing
✓

Answer

The process, by which air is drawn in from the atmosphere into the lungs and forced out from the lungs back into the atmosphere is known as breathing. It involves two steps-inhalation and exhalation.

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