Organ Systems Integration in Animals · NCERT Biology

Integration of respiratory and circulatory systems is essential for:

  1. Digestion
  2. Thermoregulation in skin
  3. Cellular respiration
  4. Urine filtration process
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Correct answer: Cellular respiration

Respiratory system supplies oxygen and removes carbon dioxide. Circulatory system delivers oxygen to cells for cellular respiration.

Difficulty: Medium Question 12 of 20

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