There has to be a person in the family with blue eyes to pass on the gene
Your heart pumps red blood cells to your lungs to get rid of carbon dioxide and get oxygen in exchange, so respiratory problem could limit the amount of oxygen your red bloods cells can take in or the amount of carbon dioxide they can get rid of. It will make the heart beat faster to get the blood oxygenated.
What stages? What people? I need the bigger picture to help you.
Let their parents know because I'm concerned for my friend
Answer:
raises your immune system while you work out
Explanation:
