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NERVOUS SYSTEM (SENSES (RECEPTOR TYPES BASED ON STIMULUS TYPE…

- - - - TUNICS
        
        Vascular Layer
        Known as Choroid
        Nourishes all layers
        pigmented, absorbs light & prevents it from scattering.
        
        Inner Layer
        Known as Retina
        Photoreceptors
        Axon converge forms optic Nerve
        
        Fibrous Layer
        
        Cornea
        Clear Part of eye
        Allows light in
        focuses light on retina
        
        Sclera
        White of the eye
        Dense Connective Tissue
        Protective, Anchor for the muscles
        Gives Shape
      - RODS AND CONES
        
        Rods
        More rods than cones
        Sensitive to Light, can see in Dim Light
        Black & White images
        
        Cones
        Best in bright light
        How were able to see color
      - LENS AND IRIS
        
        Lens
        Posterior to Iris
        Light focuses on retina
        
        Iris
        Color part of our eye
        Surrounds pupil which is just a dark hole
        sphincter muscle dilate/constrict
      - OPTIC DISC, MACULA LUTEA & FOVEA CENTRAILIS
        
        Optic Disc
        Blind spot, no photoreceptors
        
        Macula Lutea
        Opposite of pupil
        
        Fovea Centralis
        At center of Macula Lutea
        Most sharp vision occurs here
      - POSTERIOR & ANTERIOR SEGMENTS
        
        Posterior
        Largest Cavity
        Everything posterior of lens & civilary body
        Filled with viterous humor
        Supports retina & lens
        Helps maintain pressure
        
        Anterior
        Two Chambers
        
        Posterior Chamber- from iris to posterior chamber
        
        Anterior Chamber- from iris to cornea.
        Both are filled with aqueous humor
    - - Cornea->Pupil->Lens->Retina->Optic Nerve->Optic Chiasm(a)->Optic Tract-> Mid brain->Thalamus->Primary visual cortex in occipital lobe
  - - - Tongue, Inter cheeks, posterior wall of pharynx & epigottis.
        Peg like structure
        Epithelial Cells- Gustatory Epithelial Cells make up taste buds
    - - Medulla Oblongata->Thalamus->Gustatory Cortex in the Insula
      - There are 3 Cranial Nerves that transmit taste information from the tongue to the brain
        
        Facial Nerve #7
        
        Glossopharyngeal Nerve #9
        
        Vagus Nerve #10
  - - - External Outer Ear
        
        Auricle
        Gathers sound through sound waves and amplifies
        
        External Acoustic Meatus
      - Middle Ear
        
        Tympanic Membrane
        Ear Drum
        
        Auditory Ossicles
        cochlea, vibration
        liquid filled
    - - Vestibulocochlear Nerve->Cochlear Branch of CN ->Medulla Oblongata->PONS->Mid brain->Thalamus->Primary Auditory Cortex->In temporal lobe