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