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Respiration in Organisms — Science STD 7 — Question

Gujarat BoardEnglish MediumSTD 7ScienceRespiration in Organisms1 Mark
MCQ
Breathing take place with the help of
  • A
    Heart.
  • B
    Kidney.
  • ✓
    Diaphragm.
  • D
    Spleen.
✓

Answer

Correct option: C.
Diaphragm.
Diaphragm forms the floor of the chest $-$ cavity.
During inhalation the diaphragm moves down and inwards, making space for lungs.
During exhalation the diaphragm moves up making lungs to contract and air is pushed out of the lungs.
Breathing requires the up and down movement of diaphragm.

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