How are the respiratory and circulatory systems similar? (5 points) a-Both systems provide glucose and other substances to cells.
b-Both systems regulate blood flow throughout the body.
c-Both systems send messages to the nervous system for breathing.
d-Both systems help remove carbon dioxide from the body.

Monomers are the building blocks of larger molecules, called polymers. for example, proteins are composed of chains of amino acids that are linked together. cellulose is a polymer that makes up plant cell walls. cellulose is made from a chain of c6h10o5 molecules. which monomers are most likely used to produce cellulose? why?