Question

Coelom produced by splitting of mesoderm
A. Enterocoel
B. Schizocoel
C. Pseudocoel
D. None of the above

Answer 1

Hint: Coelom development occurs in the gastrulation stage while the embryo develops. An embryo's developing digestive tube forms like a blind pouch called the archenteron.

Complete Answer:
- In most species the coelom is the major body cavity which is located within the body to protect the digestive tract as well as other organs. It is coated with mesothelium, in certain species.
- It appears undifferentiated on other species, such as molluscs. Coelom characteristics were used in the past, mostly for practical purposes, to classify bilateral animal phyla into an informal category.

Now, let us find the solution from the option.
1) Enterocoel: Entero Celomas are deuterostomes. It is produced by fusion of mesoderm filled pouches (archenteron pouches or primitive gut pouches). Echinodermata, and Chordata, for example.
2) Schizocoel: The schizocoelous are protostomes. It is a cavity that forms in embryo by separating the mesodermal layer. A schizocoel formed species is named schizocoelomate, e.g: annelids and arthropods.
3) Pseudocoel: This is a bogus coelom that is not a mesoderm-line. It is associated with Archenteron.
Therefore, the coelom formed by mesoderm splitting is schizocoel.

Thus, the correct option is (B) i.e. Schizocoel.

Note: A coelom may consume shock or to provide a skeleton with hydrostatic impact. It may also provide an immune response in the form of coelomocytes which can either be bound to the coelom's shell, or float freely in it.