Its main purpose is to restore partial flow of oxygenated blood to the brain and heart. ♥
All of the above are correct
The heart should be assessed every 30 seconds
The answer is, "B", "The information can be trusted".
Answer: when females involve themselves in to physical education ,it will be difficult for them to give birth.
Explanation: Research has shown that, females that do more exercises are able to give birth without any difficulties.