Are tetrabalstic organisms there?

Asked by Padmavathitamalampudi | 11th Dec, 2019, 06:07: PM

Expert Answer:

  • A body plan of an animal shows only the most fundamental arrangement of the tissue layers. The more tissue layers, and the presence of a coelom the more complex the animal. There are as such 3 tissue layers- endoderm, mesoderm and ectoderm.
  • Accordingly, there are two types of organisms-
  • Diploblastic: An animal possessing 2 major tissue layers. These include the outer layer (the ectoderm) and the inner layer (the endoderm).
  • Triploblastic: An animal possessing 3 major tissue layers. It has a middle layer (the mesoderm), between the endoderm and the ectoderm.
  • Animals with four tissue layers do not exist. Hence, there are no tetrablastic organisms.

Answered by Sheetal Kolte | 12th Dec, 2019, 11:01: AM