Provide organs and muscles with the oxygen they need to function
Answer:
to write a table of contents you will need to list your chapters from first to last.
Explanation:
if you have a table of contents you need to write, you can list your chapters and the page numbers in the comments and I can type it up for you.
The heart needs molecule don’t take me serious cause it might be wrong
The primary function of the respiratory system is to supply blood with oxygen
