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Nervous tissue & Special sense organs, IMG_4294, IMG_4255, IMG_4256,…
Nervous tissue & Special sense organs
Nervous tissue
Supporting/Glial cells
CNS
Astrocyte
Star- shaped cell
Largest of neuroglial cells
Blood-brain barrier
Fibrous astrocyte
Protoplasmatic astrocyte
Microglia
Neuronophagia
Microglial nodules
Oligodendrocyte
Myelin sheath
Processes to cover around 50 axons
Ependymal cell
Neuroepithelial
PNS
Schwann cells
Support unmyelinated and myelinated nerve fibers
Satellite cells
Support and protect neuron of the PNS
Maintain microenvironment around neuron
Connective tissues
Nerve cells/Neurons
Cell body/Soma
Prominent nucleolus
Euchromatic nucleus
Large nucleus
Cytoplasm
Nissl body ; rER
Cytoplasmic process
Axon
Take information from cell body
Myelinated speed of nerve impulses
Dendrites
Bring information to cell body
Classification
Bipolar
1 axon 1 dendrite
Sensory neuron
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Olfactory neuron
Ganglion of vestibulocochlear nerve
Retina (Rod and Cone cells)
Unipolar
1 process
Granular layer of cerebellar cortex
Sensory neuron
Anaxonomic
only drndrites
CNS of invertebrates : insects
Multipolar
1 axon 2 or more dendrite
Motor neuron
large stellate shape
Pyramidal neuron
Purkinje cell
Betz cell
large soma and prominent apical dendrite
Sensory neuron, Motor neuron, Interneuron
Pseudounipolar neuron
Short one process (axon) and divides into 2 long process (dendrite)
Sensory neuron
Histopathology of neuron
Lipofuscinosis
Karyorrhexis
Lipofuscin granule
Organization of nervous tissue
Cerebellum
White matter
Axon
Neuroglia
Gray matter
Neurons
Neuroglia
Synapse
Spinal cord
White matter
Myelinated and unmyelinated axons
Neuroglia
Gray matter
Nerve cell body
Dendrite and neuroglia
Anterior/Ventral gray horn
Motor neuron
Posterior/Dorsal gray horn
Sensory neuron
Lateral gray horn
Sympathetic neuron (T1-L2)
Cerebrum
Gray matter
Nerve cell body
Terminal axon and dendrite
Neuroglia
Synapse
White matter
Axon
Neuroglia
Ganglion
Spinal ganglion
Concentric nucleus
Complete surrounding by satellite cells
Sensory neuron
Pesudounipolar neuron
Dorsal root ganglion
Sensory ganglion of cranial nerve
Autonomic ganglion
Motor neuron in autonomic ganglion
Eccentric nucleus
Incomplete
Multipolar neuron
Celiac/mesenteric ganglion
Meissner/Myenteric plexus
Sympathetic trunk
Enteric ganglion
Nerve fibers
Myelin sheath
Node of Ranvier
Axon
4 layers
Epineurium
Mesoneurium/Paraneurium
Endoneurium
Perineurium
Histology of Special Senses
Olfaction/Smell
Olfactory epithelium
Bipolar neuron
Supporting cells
Pseudostratified columnar epithelium
Basal cells
Vision
Iris
Lens
Cornea
Retina
Optic nerve
Vision Center
Structure of Eyeball
Outer fibrous coat
Sclerocorneal junction or limbus
Cornea
transparent and avascular part
Sclera
dense CNT
cover mucous membrane
Intermadiate vascular coat
Iris
the colored part
Ciliary body
Ciliary muscle
suspensory ligament
Choroid
outer surface contact with sclera
inner surface contact with retina
Innermost nervous layer
Rod and cone cells
Visual function
receive light and convert the light into neural signals
It extends from optic disc to ora serrata
Conjunctival
Conjunctive fornix
Bulbar or ocular conjunctive
Palpebral or tarsal conjunctive
Ciliary body
Ciliary muscle
Ciliary Processes
Hearing and Equilibrium
Middle ear
Inner ear
Outer ear
Gustation/Taste
Taste bud
Gustatory cells
Basal cells
Taste pore
Supporting cells
Taste perception
Bitterness
Sweetness
Sourness
Savoriness(Umami)
Saltiness
