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9 Cards in this Set

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Subkingdom: Parazoa
"next to animals"
Phylum: Porifera (sponges)
Phylum: Porifera
No distinct tissues, germ layers, or gut
Asymmetrical or radial symmetry
Several types of cells (mobile or totipotent)
Sessile suspension feeders with intracellular digestion
Derived from flagellated protozoan
Porifera: Epidermal layer
The thin group of cells covering the exterior body surface
Porifera: Collar-cell layer
Contain a central flagellum surrounded by a collar of microvilli
Porifera: Spongocoel
Large, central cavity of sponges
Water enters in through pores and exits through the osculum
Excretory structure in the living sponge
Large opening to the outside through which the current of water exits carrying away with it the sponge's wastes
Subkingdom: Eumetazoa
"True animals"
True tissues organized into germ layers
Embryo that goes through a gastrula stage
Phyla: Radiata and Bilateria
Phylum: Radiata
Radially symmetric
Diploblastic (only 2 primary germ layers - endoderm and ectoderm)
Phylum: Bilateria
Have a front and back end as well as an upside and downside
Triploblastic (3 primary germ layers - endoderm, ectoderm, mesoderm)
Complete digestive tracts with separate mouth and anus