How does respiration occur in Hemichordates?

Step-by-step solution

Hemichordates have a rudimentary structure in the collar region called stomochord, a structure similar to notochord. Hemichordata was earlier considered as a sub-phylum under phylum Chordata, but now it is placed as a separate phylum under non-chordata . Respiration takes place through gills in Hemichordates. Animals belonging to the phylum Chordata are bilaterally symmetrical, triploblastic, coelomate with organ-system level of organisation. Animals belonging to phylum Chordata are fundamentally characterised by t