1 what are the 5 functions of the brain
Answer:
A medical Card or Health insurance
Answer: A
Explanation: The blood–air barrier (alveolar–capillary barrier or membrane) exists in the gas exchanging region of the lungs. It exists to prevent air bubbles from forming in the blood, and from blood entering the alveoli. ... The barrier is permeable to molecular oxygen, carbon dioxide, carbon monoxide and many other gases.
Answer:
1. Positive internal effects could make you feel better inside. Positive external effects could make you look more buff and muscular.
2. Negative internal effects are that it kills your organs. And Negative external effects are that some drugs can make you look weird.
Remember! Don’t do Drugs and stay safe!
