Intro to animals: Sponges

Sponges are sessile which means..

attached to a surface/substrate and cannot move

What kind of feeders are sponges?

Filter (suspension) feeders

Sponge anatomy: What is the Osculum?

opening of sponge

Sponge anatomy: What is the Spongocoel?

central cavity of sponge

Sponge anatomy: What is the Epidermis?

Outer layer of sponge

Sponge anatomy: What is the Mesohyl?

Internal layer of sponge

What is the function of flagellated choanocytes?

filter water

What are the functions of amebocytes?

digest and distribute food, secrete skeletons

What are the 2 types of skeleton that amebocytes secrete?

Spicules (hard), spongin (soft)

What are spicules made out of? Spongin?

Spicules - caco3 or silica. spongin - collagen.

Porifera examples and what kind of spicules they produce: Granita and Eupectella

Granita - CaCO3 spicule. Eupectella - glass spicule.

What is the function of Porocytes?

let water in. open water channels

What is the common name for the species Cliona Celeta?

Boring sponge