Blood vessels carry nutrients (like glucose)and oxygen to the muscles cells that need them blood vessels take away carbon dioxide and waste from muscle cells what are two systems?

How does a gymnosperm prevent itself from pollinating the same tree

Which statement about the pancreas is not true? a. it is an endocrine organ in the abdomen. b. it release chemicals into the digestive system. c. it releases insulin to increase glucose levels. d. it release hormones into the bloodstream.

Why did mendel use pea plants in his experiments? a. they have no alleles. b. they are haploid organisms. c. they reproduce quickly. d. they are all male.