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

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

Retinal Layer Macula Lutea and Fovea Centralis – Cones – Sharp Vision

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

Lens Biconvex Transparent Avascular

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

Sheep’s Eyeball

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

Parts of the Ear

Outer Ear Helix 1.Pinna (Auricle) 2. Helix and Lobule 3. Ends where the tympanic membrane begins

Middle Ear – Ossicles 1.Malleus – hammer 2.Incus – anvil 3.Stapes - stirrup

Inner Ear Semi-circular canals Vestibule – Saccule – Utricle Cochlea – Cochlear Duct Organ of Corti