2006-11-15 15:33:07 · 3 answers · asked by HELP!!!! 1 in Science & Mathematics ➔ Biology
More importantly, large multicellular organisms have "specialized" cells. This means that if you took the average cell from the body it would simply die since most cells have outsourced various things to cells that can do it more efficiently. Blood for transporting oxygen, muscle cells for movement, etc.
2006-11-15 15:37:45 · answer #1 · answered by munkmunk17 2 · 0⤊ 0⤋
Large, multicellular organisms need a circulatory system in order for nutrients, wastes, and heat to be passed throughout the body. Individual cells get most of the above from diffusion, which is a slow process. Trying to get oxygen from the environment to a cell in the middle of your body would take forever, if it even reaches there (used up by other cells). Having a circulatory system is like a "transit" system to for all the cells inside the body. That's why the circulatory system is so complex.
2006-11-15 15:37:36 · answer #2 · answered by Silas 2 · 1⤊ 0⤋
Otherwise cells not exposed to the surface would have no way of receiving oxygen or a form of energy.
2006-11-15 15:35:18 · answer #3 · answered by Brian B 4 · 1⤊ 0⤋