Question

Do echinoderms have stomochord?

Answer 1

Stomochord:

1. Stomochord is a flexible hollow tube.
2. It forms in the embryo as an outer pocket from the roof of the gut of the embryo to the pharynx.
3. In adults, it extends dorsally from the pharynx to the proboscis and contacts the oral cavity.
4. Stomochord has the function of supporting the body.
5. It is a characteristic feature of the phylum Hemichordata.

Skeleton of Echinoderms:

1. Stomochords are not present in Echinoderms.
2. Echinoderms have a skeleton composed of calcite.