Is this a multiple choice question?
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.
Nerves are systems in you that get you nervou
A. Slow twitch
These fibers assist in movements that are not fast but are continued for long periods of time and require endurance such as marathons.
