The virus has to enter the body through cells to spread to the rest of the body.
Answer:
Inefficiency to properly absorb oxygen, or not being able to absorb oxygen properly.
Explanation:
Damage to the alveoli is a COPD related condition called Emphysema; It destroys the walls inside the alveoli (air sac), which causes them to merge into one giant air sac, thus losing its ability to properly absorb oxygen for blood re-oxygenation.
It's important to get an annual check up because, it's important to make sure you are okay and your not having something internal going on.
If you don't go to the doctor, you might become very sick and may not be able to get over it that quickly. Which is something that need's to be evaluated by a doctor.
Going to a doctor yearly is a great way to make sure there's nothing going on. Not going to the doctor is a big risk to be taking. It's very important you go see a doctor yearly.
This link will help you
http://www.stanfordchildrens.org/en/topic/default?id=blood-circulation-in-the-fetus-and-newborn-90-P...
