How is food transferred in flatworms without a circulatory system?

By diffusion

Explanation:

Flatworms are acoelomates, that is, they do not have coeloms or body cavities. This results in a flattened body that is devoid of circulatory or respiratory organs.

The flattened body enables easy diffusion of much needed nutrients and oxygen from their surroundings into their bodies. Excretory products within the body are removed by diffusing the other way round.

hey bro i looked it up on google the structure of the eye-spot in euglena viridie, e. ehrenbergii, and phacus pyriyorme is not as franzé haa described it. the so-called “crystal body” and “lens bodies” were not found in any of the individuals of the species examined by me. as earlier observers have stated, the eye-spot consists simply of a mass of pigment granules arranged in a single layer, and probably embedded in a protoplasmic framework, but the latter could not be seen, and its presence was only inferred from the fact that the pigment granules must be held together in some way, thd the eye-spot as a whole is capable of expansion, and that the pigment granules can be separated from each other.

hope this   and an i get brainlsiest