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Nervous system (Senses (Stimulus Type Receptors (Mechanoreceptors…

- - - - External environmental stiumulus receptors
      - Skin and special senses
    - - Internal organ receptors
      - Viscera
    - - stimulus origin from musclulo-skeletal components
      - tell you where body is in space
  - - - Pain
    - - Pressure
      - Baroreceptors
        
        Blood pressure
    - - Chemicals from external
      - Chemical balance in blood
    - - Light
    - - Tempurature
  - - - Posterior Segment
        
        Retina
        
        Sclera
        
        Choroid layer
        
        Vitreous Humor
      - Anterior segment
        
        Anterior Chamber
        
        Cornea
        
        Iris
        
        Aqueous humor
        
        Posterior Chamber
        
        Lens
        
        Ciliary Body
    - - Retina to
      - Posterior segment (vitreous humor) to
      - Lens to
      - Optic nerve to
      - Puipil to
      - Cornea to
      - Optic Chiasma to
      - Optic tract to
      - Midbrain and thalamus to
      - Primary visual cortex
  - - - cribiform plate
      - olfactory nerves
      - olfactory epithelium
    - - olfactory receptors to
      - olfactory sensory neurons to
      - olfactory bulb to
      - olfactory tract to
      - limbic system
      - and olfactory cortex
  - - - taste buds
        
        epiglottis
        
        tongue
        
        pharynx
        
        cheeks
    - - Signals travel from nerves to
        
        facial nerve (VII)
        
        glossopharyngeal nerve (IX)
        
        vagus nerve (X)
      - Medulla oblongata to
      - thalamus to
      - gustatory cortex
  - - - pons to
      - midbrain to
      - medulla oblongata to
      - thalamus to
      - vestibulocochlear nerve to
      - temporal lobe (primary auditory cortex)
      - vestibular nerve and cochlear nerve to
    - - Tympanic Membrane
      - Auditory Ossicles
      - External Acoustic Meatus
      - Cochlea
      - Auricle
      - Vestibular nerve
      - Internal Acoustic Meatus
      - Cochlear Nerve
- - - - Brain
      - Spinal Cord
      - Tracts
      - Nuceii
    - - Integration and command center of nervous system
  - - - Nerves
      - Ganglia
    - - Communication toward the CNS
      - Stimulus of body parts from CNS commands
  - - - voluntary reaction to exterior stimulus
    - - signals from exterior taken in by receptors
- - - - Nucleus
      - Nucleolus
      - Chromatophilic Substance (rough ER)
      - Axon Hillock
    - - Terminal Arborization
      - Axon Terminals
      - Neerve impules travels from cell body along axon
    - - nerve impulse receptors
  - - - Cell Body
      - Axon
      - Multiple dendrites
    - - Cell body
      - Axon
      - One Dendrite
    - - Cell body
      - One process
        
        Central Process
        
        Peripheral Process
  - - - transmit impulses from sensory receptors of PNS to CNS
    - - transmit impulses away from CNS to PNS
    - - between motor neurons and sensory neurons
      - in CNS only
      - 99.98% of neurons in body
- - - - Oligodendrocytes
        
        wrap around thick axons; create myelin sheaths
      - Microglial Cells
        
        smallest, least abundant; phagocytes
      - Astrocytes
        
        star shaped, most abundant glial cells in CNS
      - Ependymal Cells
        
        fomr simple epithelium lining central cavity of spinal cord and brain
    - - Schwann Cells
        
        surround all axons of PNS; create myelin sheaths
      - Satellite Cells
        
        surround neuron cell bodies