Question

key feature of hemicordata

Answer 1

Characteristic Features of Phylum Hemichordata. Hemichordata have a true body cavity or coelom. The digestive tract is complete with an anus and can be in the form of a U shaped tube or straight.

Answer 2

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$\textbf{HEMICHORDATA}$


→ This phylum includes worms. Their body is soft.

→ They have organ system level of organization system.

→ These are considered as sub-phylum under phylum Chordata.

→ They are Bilaterally symmetry and Triploblastic animals.

* Bilateral :- In which the body can be divided into two similar halves by a single plane.

* Triploblastic :- In which three layers namely; endoderm, ectoderm and mesoderm are present.

→ Body cavity is true coelom.

→ Respiration takes place by gills.

→ Circulatory system is of open type which includes dorsal heart.

→ Segmentations are absent.

→ Appendages are absent.

→ They have complete digestive system.

→ They are marine animals.

→ They are cylindrical in shape.

→ Fertilization is external and indirect development.

→ Ex :- Saccoglossus, Balanoglossus etc.
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