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FarazKlinglerNervous (Senses (Eye components: Tunic #1 Fibrous layer a.…
FarazKlinglerNervous
Senses
Eye components: Tunic #1 Fibrous layer a. sclera b.cornea Tunic #2 vascular layer-choroid Tunic#3 inner layer -retina Visual pathway: lights passes through cornea (focusing) -> pupil->lens (focusing) ->posterior segment ->retina
Olfaction components and pathway: starts at receptor cells in the olfactory epithelium in roof of nasal cavity -> bundles of filaments through cribriform plate-> turn olfactory bulb -> olfactory tract -> cerebral hemispheres -> end at the olfactory cortex
receptors based on stimulus type 1.Thermoreceptor 2.photoreceptor 3.chemoreceptor 4.noiceptor 5.nociceptor 6.mechanoreceptor 7.barorecptor
Gustation components and pathway: starts at tongue and inner checks where the facial nerve VII -> posterior of pharynx the glossopharyngeal nerve IX-> epiglottis travels by vagus nerve X-> medulla oblongata->thalamus->gustatory cortex in the insula
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ear components & pathway: external ear gather sound waves-> middle ear a.tympanic membrane b. auditory ossicles->cochlea and cochlear nerve VIII->separation to the medulla->pons->midbrain-primary auditory cortex
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Neurons
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Major components: 1.cell body 2. nucleus and nucleolus 3.chromatophilic substance 4.dendrites 5.axon hillock 6.axon 7. axon collaterals 8. terminal arborization 9.terminal boutons
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