A protein called haemoglobin in the red blood cells then carries the oxygen around your body. ... Blood without oxygen returns through the veins, to the right side of your heart. From there it is pumped to your lungs so that you can breathe out the carbon dioxide and breathe in more oxygen.
It's called the backbone
I hope this helps!<span />
The answer is C. <span>It gives educational opportunities through sports scholarships.</span>
