Stimuli
Elements in the external enviorment that are strong enough to set up a nervous impulse.
Peripheral
Situated away from a central structure.
Ganglia
Mass of nerve tissue composed of nerve cell bodies.
Neuron
Nerve cell.
Duct
Narrow round tube that carries secretions from a gland.
Sclera
White of the eye.
Choroid
Second coating of the eye.
Retina
Innermost coating of the eye.
Optic nerve
Recieves a picture and interprets.
Auricle
Outside projection
Typanic membrane
Eardrum
Ossicles
Three small bones in the middle ear.
Receptors
Nerves that respnd to simili