Phylum Porifera Flashcards
habitat of sponges
marine
habit of sponges
solitary or colonial
cells that compose sponges
pinacocyte, porocyte, amoebocyte, choanocyte, oocyte, lophocyte, sclerocyte
germ layers of a sponge
endoderm, ectoderm, and mesoglea (gelatinous matrix)
has numerous perforations for the entry of water
ostia
a large pore at the apex or top for the exit of the water
osculum
between Ostia and osculum
spongocoel
what system is present in sponges?
water canal system
small needle-like or sharp-pointed structures of calcite or silica that make up the skeleton of a sponge
spicules
sponges’ way of eating
filter-feeding
reproduction and sex of a sponge
asexual and sexual; hermaphroditic
what do sponges do to reproduce sexually?
role play to decide who will play what sex
how do sponges reproduce asexually?
budding
controls water flow through Ostia
porocyte
forms outer covering of the sponge
pinacocyte
egg cell
oocyte
delivers nutrients to cells
amoebocyte
secretes collagen
lophocyte
secretes silica spicules
sclerocyte
classes under Phylum Porifera
Calcarea, Hexactinellida, Demospongiae, Sclerospongiae
glass sponges
“the most beautiful sponge in the world”
spicules made up of silica
Class Hexactinellida
cellular sponges
spicules made up of calcium carbonate
Class Calcarea
most diverse class of sponges
Class Demospongiae
made up of calcium carbonate, silica, and spongia
Class Sclerospongiae
