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HESI Anatomy & PhysiologyEye, ear and the rest

The Special SensesHESI A2 cheat sheet

Eye, ear and the rest

7 key facts 2 practice questions Reviewed Oct 2026
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Eye

  • Light path: cornea → pupil → lens → retina
  • Rods — dim light and black/white; cones — color and detail
  • The optic nerve carries the signal to the occipital lobe

Ear

  • Outer — pinna and canal · middle — ossicles · inner — cochlea
  • Cochlea for hearing; semicircular canals for balance

Taste & Smell

  • Chemoreceptors; smell contributes most of perceived flavor

Touch

  • Receptors in the dermis for pressure, temperature and pain
Key takeaway

Eye, ear and the rest

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Calcium is a mineral especially important for strong:

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