Gas Exchange

Question 1

How do the features of the gas exchange system differ from one another?

Answer 1

Gas exchange surfaces in organisms vary greatly, with different organisms developing unique mechanisms for transporting gases based on size and location etc. However, all surfaces share common features that enable maximum gas exchange in the shortest time, ensuring efficient gas exchange.

Question 2

What are the common features of the gas exchange system?

Answer 2

1. The gas exchange system has a large surface area which allows for faster diffusion of gases across the surface.
2. The gas exchange system has thin walls which ensures for short diffusion distances.
3. The gas exchange system has good ventilation with air so that the diffusion gradients can be maintained.
4. The gas exchange system has a good blood supply to maintain a high concentration gradient which helps diffusion occur faster.

Question 3

Where does gas exchange take place in human beings? What are some features of it?

Answer 3

The gas exchange of human beings takes place in the alveoli.

Adaptions of alveoli -
1. Large surface area
2. Surrounded by capillaries which leads to good blood supply
3. Has thin moist walls