Porifera
hermaphroditic, sexually and asexual reproduction (budding), filter feed
Porifera feed through
collar cells & amoebocytes
collar cells
flagella that pulls in particles that are trapped in the collar
amoebocytes
they distribute the food from the choanocytes and get rid of waste & store food as fat
Porifera includes the following class
class calcarea, class hexactinellida, class demospongiae
Phylum Cnidaria
They are jelly like, epidermis and gastrodermis,
Snidaria have what type of neuro arrangement
nerve net
how do cnidaria eat
the food goes to the gastrovascular cavity in which it is digested extracellularly then phagocytized
Cnidaria jellyfish form
there is one opening for mouth/anus, but it will be at the bottom medusa
Cnidaria not jelly fish but jelly
the mouth/anus is one opening at the top, they are polyp, this and the medusa can alternate
Cnidocytes
the cells that contain a whip like stinging barb called menatocyst, they alt btw polp (sessile) & medusa (free swimming). polyp is main part
what is a class within cnidaria
class hydrozoa, class scyphozoa (jellies), class cubozoa (box jellies), class anthozoa
jellies are _ dominant
medusa form dominant
what is a small description of class anthozoa
the are only in polyp form, like sea anemones and corals, w/ symbiotic relationship with dinoflagellates
Phylum Platyhelminthes
branched gastrovascular w/ extra and intra cellular digestion, no circulatory and respiratory, nerve cords, dorsa-ventrally flattened
in phylum platyhelminthes class turbellaria
free living, light sensitive eyes, included in planaria
in platyhelminthes the class trematoda
are all parasitic, external or internal, have complex life cycles
in platyhelminthes the class cestoda
these include tapeworms, with repeating organs w/ 2 hosts
Phylum Nematoda
they have longitudinal muscles, free living, parasitic, lots of environments pump water all over their skeletons
Mollusca
second largest phyla, all habitats, most can have seperate sexes, but some are hermaphrodites, all major organs, open circulatory
in mollusks mantle
tissue that drapes over the visceral mass
in mollusks calcium carbonate cell
in some, but can be reduced and not there in some cases
in mollusks visceral mass
area that contains organs
in mollusks radula
this is a conveyer belt of teeth that scrapes food
in mollusks the muscular foot
this is the organ used for movement
mollusks class polyplacophora
segmented shell only, interdial, scrape algae
mollusks, class bivalvia
filter feeders, a shell that divides into two
mollusks class gastropoda
mantle is highly vascularized for respiration in terrestrial, torsion / twist in organs during development
in mollusks cephalopoda
octupous, squid, cuttlefish, they have modified in siphon, tentacles and head with closed circulatory system, can learn, w/ camera eye
phylum annelida
they are segmented each with a different organ, both circular and longitudinal, they have a closed circulatory system, marine & freshwater, leeches
phylum arthropoda
lots of species with jointed appendages, legs, feeding, swimming, sopulation & defense, chitin, internal fertilization w/ seperate sexs