Flatworms absorb oxygen by diffusion mechanism through their
skin to the cells in their bodies. Since flatworms do not have a circulatory system,
their bodies' cells are positioned close to the skin to ease the uptake of
oxygen from surrounding fluids or water.
I think its that the circulatory system keeps blood flowing and supplies blood to the organs and keeps the heart pumping and the respiratory system keeps you breathing an supplies oxygen to the organs
<span>a.
identifying several solutions to a problem
b.
questioning source information
c.
implementing the first solution to a problem identified
d.
verifying source information</span>
