Porifera

In Glogpedia

by Bargu
Last updated 5 years ago

Discipline:
Science
Subject:
Botany
Grade:
9

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Porifera

Venus' Flower Basket

Porifera

Porifera examples

Sycon

Euplectella

A stove-pipe sponge

Spongilla

Sponges are animals of the phylum Porifera (meaning "pore bearer"). They are multicellular organisms that have bodies full of pores and channels allowing water to circulate through them.Sponges do not have nervous, digestive or circulatory systems. Instead, most rely on maintaining a constant water flow through their bodies to obtain food and oxygen and to remove wastes.

Sponges are similar to other animals in that they are multicellular, heterotrophic, lack cell walls and produce sperm cells. Unlike other animals, they lack true tissues and organs, and have no body symmetry.While most of the approximately 5,000–10,000 known species feed on bacteria and other food particles in the water, some host photosynthesizing micro-organisms as endosymbionts and these alliances often produce more food and oxygen than they consume. A few species of sponge that live in food-poor environments have become carnivores that prey mainly on small crustaceans.


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