The central cavity of sponges, the paragastric cavity, is lined by .......... cells.

Choanocyte

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Chromocyte

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Amoebocyte

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Pinacocyte

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Solution

The correct option is A Choanocyte
The spongocoel is the central gastric cavity of the sponges. The spongocoel is also referred to as the para-gastric cavity of the sponges. It is mainly lined by choanocytes that are specialized digestive cells with flagella. Water enters the spongocoel via ostia and leaves it via the osculum.
So, the correct answer is 'Choanocyte'.

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Similar questions

Name the following:
(a) Cavity present in the body of sponges.
(b) Cavity present in the body of cnidarians.

A. Polyp	1. Body cavity not lined by epithelium
B. Acoelomate	2. Blood filled cavity of arthropods
C. Pseudocoelomate	3. A cnidarian asexual body form
D. Hemocoel	4. Lack in internal body cavity
	5. Cavity unique to sponges

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