Fill in the Blanks

1. Breaking of pyruvate using oxygen takes place in the ………. .

2. Rings of cartilage are present in the wind pipe to ensure that the ………. .

3. The blood has ………. cells which plug the leakage in the vessels by helping to clot the blood at the point of injury.

4. ………. transports products of photosynthesis from the leaves to other parts of the plant.