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While trying to find out the characteristic of a newly found animal, a researcher did the histology of adult animal and observed a cavity with presence of mesodermal tissue towards the body wall but no mesodermal tissue was observed towards the alimentary canal. What could be the possible coelome of that animal?
A
Acoelomate
B
Pseudocoelomate
C
Schizocoelomate
D
Spongocoelomate
Explanation
A cavity lined by mesoderm only on the somatic/outer wall is a pseudocoelom.
Detailed Solution
In pseudocoelomate animals (e.g. Aschelminthes), the body cavity is derived from the blastocoel and is lined by mesoderm towards the body wall, but not towards the gut/endoderm (scattered mesodermal pouches).