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Question
The figures given below show the types of coelom. Identify them and select the correct group of organisms which they are present.
The figures given below show the types of coelom. Identify them and select the correct group of organisms which they are present.
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Solution
The correct option is D A - Annelids, B - Ascelminthes, C – Platyhelminthes
Presence or absence of a cavity between the body wall and the gut wall is an important creteria for classification of animals.
The body cavity, which is lined by mesoderm is called coelom. Animals possessing coelom are called coelomates, e.g., annelids, molluscs, arthropods, echinoderms, hemichordates and chordates.
In some animals, 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 and the animals possessing them are called pseudocoelomates, e.g., aschelminthes.
The animals in which the body cavity is absent are called acoelomates, e.g., platyhelminthes.
Presence or absence of a cavity between the body wall and the gut wall is an important creteria for classification of animals.
The body cavity, which is lined by mesoderm is called coelom. Animals possessing coelom are called coelomates, e.g., annelids, molluscs, arthropods, echinoderms, hemichordates and chordates.
In some animals, 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 and the animals possessing them are called pseudocoelomates, e.g., aschelminthes.
The animals in which the body cavity is absent are called acoelomates, e.g., platyhelminthes.
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