Classification of Phylum Porifera

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What are the two types of openings found in the body surface of sponges?

Ostia and oscula

What type of animals are sponges in terms of germ layers?

Diploblastic animals

How do sponges reproduce?

Both by asexual and sexual methods

What is the characteristic skeleton of sponges made of?

Either fine flexible spongin fibres, siliceous spicules, or calcareous spicules

What is the interior space of a sponge body called?

Spongocoel

What distinguishes sponges from other animals in terms of respiratory and excretory organs?

They are absent in sponges

What are the two types of openings found in the body surface of sponges?

Ostia and oscula

Describe the body shape of sponges.

Vase or cylinder-like, asymmetrical or radially symmetrical

What are the three types of skeletons found in sponges?

Fine flexible spongin fibres, siliceous spicules, or calcareous spicules

How do sponges reproduce?

Both by asexual and sexual methods

What is the general habitat of Porifera?

Aquatic, mostly marine, except one family that lives in freshwater

What are the three main layers that make up the body of a sponge?

Outer ectoderm, inner endoderm, and intermediate layer of mesenchyme

Learn about the classification of Phylum Porifera based on the types of skeletons found in sponges, as suggested by Hyman in 1940. Explore the general characteristics of sponges such as their aquatic nature, sessile behavior, and body shapes.

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