Phylum:Rotifera & Nematoda

-(both)Body cavity not enclosed by mesoderm

(Pseudocoelomates)

-(both)body cavities

Phylum:Rotifera

-"Rotifer"-"wheel bearer"

-Tiny animals that mainly inhabit fresh water

-Some live in ocean/damp soil

-Truly multicellular

-Completed digestive tract

-Specialized organs system

-Organs lie w/in the pseudocoelom

-Crown of cilia that draws a vortex of water into the

mouth,posterior of the mouth is jaw like organ that

grinds food

-Reproduction;parthenogenesis

Phylum:Nematoda

-Long,slender bodies

-Pseudocoelomates

-Unsegmented

-Digestive tract w/ 2 openings

-Bilateral symmetry

-Cephalization

-Common in soil

-Many species are parasites