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Question
Which of the following phylum is characterized by absence of coelom?
Which of the following phylum is characterized by absence of coelom?
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Solution
The correct option is C Platyhelminthes
Coelom is the principal body cavity in most animals, which is located between the gastrointestinal canal and the body wall.
(A) Acoelomates - Animals in which the coelom is absent, e.g., Platyhelminthes.
(B) Pseudo coelomates - Animals in which the body cavity is not lined by mesoderm; instead, the mesoderm is present as scattered pouches in between the ectoderm and endoderm. Such a body cavity is called pseudocoelom. e.g., Aschelminthes.
(C) Coelomates - Animals possessing coelom, i.e., the body cavity which is lined by mesoderm on all sides.
Coelom is the principal body cavity in most animals, which is located between the gastrointestinal canal and the body wall.
(A) Acoelomates - Animals in which the coelom is absent, e.g., Platyhelminthes.
(B) Pseudo coelomates - Animals in which the body cavity is not lined by mesoderm; instead, the mesoderm is present as scattered pouches in between the ectoderm and endoderm. Such a body cavity is called pseudocoelom. e.g., Aschelminthes.
(C) Coelomates - Animals possessing coelom, i.e., the body cavity which is lined by mesoderm on all sides.
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