I think its matter
hope that helps
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Number 6. Response to stimuli. At least I think. Or 6, homeostasis.
The doctor examined her external ear canal and tympanic membrane with an otoscope. An otoscope is an instrument used to visually examine the external ear canal and tympanic membrane. Eardrum or tympanic membrane is a thin layer of tissue in human ear that receives sound vibrations from the outer air and transmits them to the auditory ossicles, which are tiny bones in the tympanic cavity.
The ocular. Maybe a mirror, depending on the model.
