Answer:
hesabu yangu ya frei mbele logi masic ungiwanahesabu yangu ya frei mbele
hesabu yangu ya frei mbele logi masic ungiwana yas me
Answer:
The correct answer would be D.Alveolar sacs are surrounded by thin capillaries where gases can be exchanged.
Alveoli are tiny sacs which form the site of gas exchange in the lungs.
The features of alveoli which help in gas exchange are:
- They increase the surface area in the lungs thus, more space is available for gas exchange.
- They have very thin walls, as thin as the thickness of a single cell only.
- They are surrounded by a bunch of thin capillaries which exchange gases with alveoli.
Answer:
Lets say you are running in P.E. If you run for to long you get tired. When you are tired you run out of energy and cant run anymore.
Explanation:
