In flatworms and sea anemones,circulation of solutes and gases is by way of
A) interstitial fluid diffusion.
B) an open circulatory system.
C) a closed circulatory system.
D) cell to cell transport.
E) intracellular diffusion.

Question

Quizplus · Accepted Answer

In flatworms and sea anemones, the circulation of solutes and gases occurs by interstitial fluid diffusion. These organisms have no specialized circulatory system, and the dissolution of gases and nutrients takes place through the exchange of fluid between cells and the environment, facilitated by the movement of molecules from an area of high concentration to an area of lower concentration.

In Flatworms and Sea Anemones,circulation of Solutes and Gases Is