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Special Senses

Special Senses. Biology 2121 Lab. The Eye - Structure. Layers of the Wall of the Eyeball 1. Fibrous 2. Vascular 3. Inner Layer (Retina). Layers of the Eyball. 1. Fibrous Layer Sclera ------  Cornea 2. Vascular Layer “Uvea” Posterior: Choroid Ciliary Body Anterior: Iris.

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Special Senses

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  1. Special Senses Biology 2121 Lab

  2. The Eye - Structure • Layers of the Wall of the Eyeball • 1. Fibrous • 2. Vascular • 3. Inner Layer (Retina)

  3. Layers of the Eyball • 1. Fibrous Layer • Sclera ------ Cornea • 2. Vascular Layer • “Uvea” • Posterior: Choroid • Ciliary Body • Anterior: Iris

  4. Layers of the Eyeball • 3. Retina • Outer: Pigmented Layer • Inner: Neural Layer • 4. Inner Layer • Photoreceptor Cells • Rods and Cones

  5. Retinal Layer • Macula Lutea and Fovea Centralis • Cones • Sharp Vision

  6. Internal Chambers – Fluids • Aqueous Humor • Anterior Eye • Clear Fluid; Ciliary process produces • Constantly drained • Vitreous Humor • Embryonic Development

  7. Lens • Biconvex • Transparent • Avascular

  8. Outer Structure • Superior Rectus Muscle • Attaches to Frontal bone • Indicates medial • Extrinsic Eye Muscles • Insert into the Sclera

  9. Sheep’s Eyeball

  10. The Ear • Sections of the Ear • 1. Outer Ear • 2. Middle Ear • 3. Inner Ear • Cranial Nerve VIII • Vestibulocochlear Nerve

  11. Parts of the Ear

  12. Outer Ear • Pinna (Auricle) • 2. Helix and Lobule • 3. Ends where the tympanic membrane begins Helix

  13. Middle Ear – Ossicles • Malleus – hammer • Incus – anvil • Stapes - stirrup

  14. Inner Ear • Semi-circular canals • Vestibule • Saccule • Utricle • Cochlea • Cochlear Duct • Organ of Corti

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