Pleeeaasse meee
then the red blood cells travels to the system
i think its circulatory but i dont know for sure

What is the 77 element on the periodtic table

Did you know that a blue wales tongue weighs more than an elephant?

What is the significance of the protein-lined pits? a. protein attracts other proteins needed for atp synthesis within the cell. b. protein-lined pits are able to transport one molecule at a time down the concentration gradient within the cell. c. the polarity of proteins allows other polar molecules to attach and be transported in the cell by transport channels. d. receptors within the pits allow ligands to fuse and be transported into the cell by endocytosis.