phylum porifera(sponges)

what is a common name for porifera?

sponges

when did porifera develop?

in the pre-Cambrian age about 660 million years ago

what type of symmetry are sponges categorized as?

asymmetrical(cannot form mirror images when cut)

are porifera segmented?

no

do poriferan have any specialized tissues?

no

do sponges have a coelum?

no

what special structures do porifera have?

collar cells, whip-like flagella, amoebocytes, spicules, Ostia

what are the four classes of Porifera?

calcera, demospongiae, scleropongiae, hexantinellida

how do sponges move?

they don’t unless its in the stages before they attach to the bottom of the ocean

what are the class calcera?

calcareous sponges that have spicules

what are the class demospongiae?

horn sponges(bath sponges)

what are the class scleropongiae?

coralline or tropical reef sponges

what are the class hexactinellida?

glass sponges

what is habitat/ecological niche of sponges?

at the bottom of the ocean being heterotrophs

what is different about sponges compared to other animals?

they evolved separately and have a different common ancestor than any other animal

do sponges have organ systems?

no

how do sponges reproduce?

asexually through budding or fragmentation, and sexually through pushing a sperm/egg cell from the central cavity and into the ocean to find a place to settle and grow

what does sessile mean?

non-moving or unable to move

what are collar cells?

flagellated cells that push water into the sponge’s body cavity and collects nutrients from the water

what are amoebocytes?

cells that digest food and help build the sponges skeleton

what are spicules?

proteins that help support the sponge and aid in reproduction

what are ostium pores?

the pores that allow water to enter the sponge