animals with no backbone
animals with a backbone
a mechanism of homeostasis where the body reacts to something in the external world (ex: getting hot and sweating)
hollow ball of cells
an animal whose mouth is formed from the blastopore
animal whose anus is formed from the blastospore
opening through which waste leaves the digestive tract
inermost germ layer
middle germ layer
outermost germ layer
symmetry going around in a circle across the body
symmetry that can split into two identical parts
concentration of sense organs and nerve organs at the front end of the body
specilized cells that use flagella to move a steady current of water through the sponge
spike-like structure made of chalklike calcium carbonate or glasslike silica
specialized cells that move around within the walls of the spong
fertilization in the inside of the body
immature stage of an organism
groups of archaeocytes surrounded by a tough layer of spicules
poison-filled sting structure that contains a tightly coiled dart
stinging cells located along tentacles in which cnidarians get their name
a cylindrical body with armlike tentacles; mouth points upwards, routed to ground
motile, bell-shaped body with a mouth on the bottom
digestive chamber with one opeing
a loosely organized network of nerve cells that together allow cnidarians to detect stimuli
consists of a layer of circular muscles and a layer of longitudinal muscles that (along with the nerve net) enable the body to move
fertilization on the outside of ones body
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