Class 11 Biology Animal Kingdom Phylum Hemichordata

Phylum Hemichordata

  • Phylum hemichordata consists of a small group of worm-like marine animals.
  • They have organ-system level of organization, bilaterally symmetrical, triploblastic and coelomate animals.
  • The body is cylindrical and is composed of an anterior proboscis, a collar and a long trunk.
  • Circulatory system is of open type, respiration takes place through gills and excretory organ is proboscis gland.
  • Sexes are separate, fertilization is external and development is indirect.

Class_11_Biology_AnimalKingdom_Balaoglossus

Example- Balanoglossus and Saccoglossus.

Share these Notes with your friends  

< Prev Next >

You can check our 5-step learning process


.