What’s the common
name of this organism?
Sponge
What is the phylum?
Porifera
Sponges are at the ______
level of organization
Sponges are at the
cellular level of
organization
What is the name for
excurrent pores?
Osculum
What is the function of
choanocytes?
Choanocytes form much
of the sponge body and
function in filter feeding
and intracellular
digestion. Choanocytes
help distinguish phylum
porifera.
What type of symmetry
do sponges have?
Sponges are either
asymmetrical or radially
symmetrical.
Incurrent openings or
pores are
termed_______.
Incurrent openings or
pores are termed ostia.
Sponges have an
exoskeleton formed of
what?
1. Spongin--spongy fibers of a
protein material
2. Spicules – rigid crystalline
structures made of calcium or
silica
The central cavity of a sponge is
called what?
Spongocoel