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13 Cards in this Set

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  • Back
Sponges
Filter Feeders
Cells found in the ectoderm of jellyish
Nematocysts
A type of ________ in whichseveral differentplanes could dividean animalinto equal halves.
Radial Symmetry
there are two equal sides of the animal
Bilateral Symmetry
what most animals control their bodies through _______.
Neurons
an invertibrates switchboard is a ________.
Ganglion
somthing an organism can sense
Stimulus
a structure that can sense the stimulus and then start an impuls traveling along a neuron.
Sensory Receptors
because the blood never leaves the blood vessels this systm is called ______ ___________ ______.
Closed Circulatory System
these help control an earthwormas blood pressure
Aortic Arches
the smalest blood vessel
Capillaries
blood vessels that carries blood to the heart
veins
all but the first and the last few segments have this
nephridia