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Lecture 10

Animal Traits, Sponges & Cnidarians

TermDefinition
Heterotrophs Cannot make their own food so they must ingest food.
Parazoa Lacks tissue(s).
Eumatazoa Has tissue(s).
Endoderm Innermost layer of tissue in an animal embryo.
Ectoderm Outermost layer of tissue in an animal embryo.
Mesoderm The layer that occurs between the two layers, ectoderm and endoderm.
Spicules The middle layer of cells in the sponge secrete these to create a fibrous skeleton.
Polyp Body shape of Cnidarians that is attached to something and where the mouth is pointing upward.
Medusa Body shape of Cnidarians that is unattached and floating and where the mouth is pointing downward.
Nematocyst Cnidarians can paralyze their prey with a toxin located at the tip of this.
Hermaphrodites Most sponges are this where they produce both the sperm and the eggs.
Protostomes First opening is the mouth.
Deuterostomes First opening is the anus.
Radial Jellyfishes have this type of symmetry.
Bilateral Humans and insects have this type of symmetry.
Asymmetrical Sponges have this type of symmetry.
Created by: bngrimes1995