sponges part of test

sponges used to belong to the simplest phylum called

Porifera

Poreferia means

pore bearing

how many phylums do sponges belong to now

2

Ectoderm:

Outer layer of the sponge

endoderm

innerlayer of the sponge

what is between the endo and ectoderm of the sponge

a jelly like substance called MESENCHYME.

what is in the MESENCHYME layer

amebocytes

They have

incurrent pores:

opening in which the water enters the sponge

They have a single

osculum:

opening in which the water exits the sponge

sessile:

unable to move attahed to something their whole life

Have spicules:

Bone like structures thta help sponge maintin shape

how are sponges classified

based on what material their spicules are made out of

first phylum of a sponge

Calcarea

what are spicules made out of in the phylum calceria

calcium carbonate

ascon

3 rayed spicule

sycon

1 rayed spicule

leucon

4 rayed spicule

second phylum of sponge

Silicea

silcea sponges look like what and are made of what

glass, silica

third type of sponge not a phylum

Demospongiae

spongecoel

central cavity

sponges are

hemephrodites

what is hemephrodite

animal that produces both eggs and sperm

sponges are asexual what are the steps

budding, fragmentation,regenration and produce gemules

whar are gemules

a cell that is highly resistent to hot and cold

what do sponges not have

tissue, nervous system,

why are sponges known as suspension feeders

pull in food through their pores into their

spongocoel ( central cavity) out of their

osculum.

what is a ambeocyte

they can turn into egg or sperm cells, digestive cells, or spicule forming cells

what are silcia spicales made out of

silica

most scientist want to include demeo sponge in what phylum

calceria

Demeo sponge are most commonly used as

spongest to shower with

how many spicules do demeosponges have

none