Write detials about phylum hemichordata with diagram of (hnfikpbnuu) junction.
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Hemichordata have a rudimentary structure in the collar region called stomochord, a structure similar to notochord.
This phylum consists of a small group of worm like marine animals with organ system level of organisation.
They are bilaterally symmetrical, Triploblastic and coelomate animals.
The body is cylindrical and is composed of anterior proboscis, a collar and a long truck.
Circulatory system is of open type.
Respiration takes place through gills.
Excretory organ is proboscis gland.
Sexes are separate.
Fertilization is external and Development is indirect.
Examples : Balanoglossus, Saccoglossus.
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