senses and their organs, and also ways the stimuli reach the brain.
respond to sight. parts: optic nerve, pupil, cornea, lens, retina
respond to sound waves, vibration. parts: cochlea, eardrum, hammer, anvil, stirrup
respond to chemicals in air, odors. parts:olfactory nerves, smelling receptors, mucus
respond to touch, pain, pressure, temperature. parts: sensory receptors
respond to chemicals in food, sweet, sour, bitter, salt. parts: taste receptors
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