Poison. Definitely don't add anything poison related. To seriously answer this question I need a list
Answer:
Antibiotics are used to treat or prevent some types of bacterial infections.
In order to "identify necessary help" you need to first identify the obstacles.
~Hello there!
Your question: Gas exchange in the lungs is facilitated by: ___________.
Your answer: Gas exchange in the lungs is facilitated by adequate amount of surfactant.
Any queries ^?
Happy Studying! :D
