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.
<span>This view led individuals and businesses to disregard these areas as unimportant and therefore they served as prime locations for dumping and pollution. This dumping and pollution led to the further degradation and destruction of these vital natural habitats.</span>
Answer:
What is the name of this website
or the book?
I think it is rna, or ribosomes
Answer:
Tundra, taiga, coral reef, desert.
Explanation:
