Questions set on fainting is not complicated, but some key words are easily omitted. We should relate the answer to the insufficient oxygenated blood supplied to the brain.
Meanwhile, some question may tell you that a kind of valve in the heart is not function properly and you immediately know that it hinders the prevention of the back flow of blood. HOWEVER the specific chambers are necessary to be stated. Let's say, if the bicuspid valve does not close properly, oxygenated blood in the left ventricle will flow back to the left auricle.
沒有留言:
張貼留言