I. Observe both the diagrams A and B. Which diagram indicates inhalation? Describe how it occurs.

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I. Observe both the diagrams A and B. Which diagram indicates inhalation? Describe how it occurs.

thoracic breathing expansion and compression

II. If diffusion were to move oxygen in our body, it is estimated that it would take 3 years for a molecule of oxygen to get to our toes from our lungs. Then, how is oxygen delivered to all parts of our body?

Class 10Science

Answers (1)

digitalvishal355

I. A depicts inhalation.

Ribs get lifted
Diaphragm is flattened,
The chest cavaty becomes larger
Air is sucked in.

II. In human beings, the respiratory pigment haemoglobin has a very high affinity for oxygen. This pigment is present in the red blood corpuscles. This oxygen-rich blood is then pumped by the heart to the rest of the body.