An acid because if its less than 5 its an acid
On the pH scale 7 is a neutral. Anything below 7 is acidic and anything above 7 is a base.
Answer:
because the blood in the heart gets what's left of oxygenated blood first. first come first serve concept. the heart cells survive longer because they have oxygenated blood longer and more frequently. if the person is not breathing the oxygen in the blood might run out by transferring to cardiovascular cells before it gets to the brain.
Explanation:
I believe that would be an open system.
