First slide

Classification of Animals

Question

Select the correct combination with reference to sponges.

Easy

A

Inhalant aperture – Osculum
B

Collar cells – Choanocytes
C

Exhalant aperture - Ostium
D

Body cavity – Gastrovascular cavity

Solution

Choanocytes are the collar cells that line the spongocoel and some canals in sponges.
Ostia are the inhalant apertures while osculum is the exhalant aperture.
The central cavity is called spongocoel.
Gastrovascular cavity is found in coelenterates.

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