The answer is a. the abiotic components of an ecosystem
If the inner lining of the air sacs neither thin nor highly vascularized, then it can be inferred that AIR SACS ARE CANNOT BE THE SITES OF GASEOUS EXCHANGE BETWEEN AIR AND BLOOD. Air sacs are generally lined with mucus and surrounded with blood capillaries.
In case of birds, air sacs play an important role in respiratory system.
I believe is the thermoreceptors present in the skin as well as part of the brain called hypothalamus.
Why can’t you just write a paragraph?
Answer:
breaking bonds of sugars to form new molecules
Explanation:
