Biology · ANIMAL KINGDOM

Cnidarians exhibit a central body cavity with a single opening on a elevated structure. Name this opening and structure, and identify the type of digestion present in them.

A
Osculum; digestion is strictly intracellular
B
Ostium; digestion is only extracellular
C
Single opening (mouth) on hypostome; digestion is both extracellular and intracellular
D
Anus on blastopore; digestion is absent

View Answer & Solution

Correct answer · Option C

Single opening (mouth) on hypostome; digestion is both extracellular and intracellular

Cnidarians have a central gastro-vascular cavity with a single opening, mouth on hypostome. Digestion is both extracellular and intracellular.