Q3. Which of the following statements are true about respiration
a. During inhalation , ribs move inward and diaphragm is raised
b. In alveoli exchange of gases takes place Ie oxygen from blood into alveolar
air l
c. Haemoglobin has greater affinity for carbon dioxide than oxygen
d. Alveoli increase the surface area for absorption of gases
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b c and d are correct statements about respiration
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