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psuedocoelom body cavity between the endoderm and mesoderm tissues that is partially lined with mesoderm tissue
nematoda phylum of roundworms
anus opening through which wastes leave the digestive tract
septum internal wall between the segments of an annelid's body
seta bristle attached to the segments of many annelids
crop in earthworms, part of the digestive system in which food can be stored; in birds, structure at the lower end of the esophagus in which food is stored and moistened
gizzard in earthworms, part of the digestive system in which food is ground into smaller pieces; in birds, a muscular organ that helps in the mechanical breakdown of food
closed circulatory system system in which blood is contained within a network of blood vessels
gill filamentous organ in aquatic animals specialized for the exchange of gases with water
nephridium excretory organ of an annelid that filters fluid in the coelom
clitellum band of thickened, specialized segments in annelids that secretes a mucus ring into which eggs and sperm are released
Created by: 100critter