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Understanding the Human Senses: Eyes, Ears, Taste, Smell, and Touch

Explore the intricacies of human senses, focusing on the eye and ear structures along with taste, smell, and touch mechanisms. Learn about the anatomy of the eye including the sclera, cornea, and retina, and discover the role of photoreceptors in sight. Examine the ear’s components from outer to inner structures, and understand the conditions affecting hearing. Additionally, delve into taste and olfactory systems, revealing how they collect sensory data. This comprehensive overview offers valuable insights into our sensory functions.

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Understanding the Human Senses: Eyes, Ears, Taste, Smell, and Touch

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Presentation Transcript

  1. Senses

  2. Eyes • http://www.nei.nih.gov/health/eyediagram

  3. Introduction • Sight • Hearing • Touch • Smell • Taste

  4. External Features of the Eye • Conjuctiva • Eyelids • Canthus • Medial • Lateral • Tarsal Glands • Ciliary Glands

  5. Lacrimal Apparatus • Lacrimal glands • Lacrimal canals • Nasolacrimal duct • Tears • Lysosomes

  6. Eye structure • Sclera – white of the eye • Tough connective tissue • Choroid coat – blood vessels • Retina – intermost part • Sight • Rods & cones

  7. Sclera • Cornea • Iris • Lens • Pupil • Aqueous Humor – Anterior Chamber

  8. Choroid coat • Vitreous Humor – Posterior Chamber • Cilliary Body

  9. Retina • Photoreceptors • Rods • Cones • Neuron chains • Bipolar cells • Ganglion cells • Optic nerve • Optic Disc

  10. Eye Muscles • Pg 274 • Cranial Nerves • III • IV • VI

  11. Eye Diseases • Cataracts • Conjunctivitis • Glaucoma • Hyperopia • Myopia • Macular Degeneration • Presbyopia • Stabismus

  12. EAR • Outer Ear – Auricle to Eardrum • Ceruminous glands produce cerumen • Middle Ear – eardrum to ossicles • Malleus (hammer) • Incus (anvil) • Stapes (stirrup) • Inner Ear – bony labyrinth • Cochlea – organ of Corti • Vestibule – oval window • Semicircular canals – balance & equilibrium

  13. Ear Conditions • Hearing loss • Meniere’s Disease • OtitisExterna • Otitis Media • Otosclerosis

  14. Taste • Tongue - has chemoreceptors • Taste buds • Papillae • Fungiform • Cirmcumvallate • Gustatory cells • Cranial nerves • VII • IX • X

  15. Smell • Chemoreceptors in the nose • Olfactory receptors • Can detect over 6,000 smells • More sensitive than taste • Postage stamp size area located in the superior aspect of the nose • Olfactory receptor cells - neurons on cilia & mucous that travel to Olfactory nerve

  16. Touch • Receptors for: • Heat • Pressure • Light • Deep • Pain

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