Tectorial Membrane

Figure 1-50

Myelinated Nerve Fibers (Cross Section)

Central core stains dark; insulating myelin appears white. (X250)

Core of nerve Axon Myelin sheath Neurilemma Capillary

Figure 1-50

Myelinated Nerve Fibers (Cross Section)

Central core stains dark; insulating myelin appears white. (X250)

Core of nerve Axon Myelin sheath Neurilemma Capillary

Neurilemma

Figure 1-51

Spinal Cord, Lumbar Region (Cross Section)

Top is dorsal, bottom is ventral. Light central dot is central canal. Darkly staining H-shaped region is gray matter of cell bodies; surrounding lighter material is composed of myelinated axons. Ventral horns of gray matter contain motor neurons; dorsal horns contain cell bodies of sensory pathways.

White matter Dorsal horn Central canal Ventral horn

Figure 1-51

Spinal Cord, Lumbar Region (Cross Section)

Top is dorsal, bottom is ventral. Light central dot is central canal. Darkly staining H-shaped region is gray matter of cell bodies; surrounding lighter material is composed of myelinated axons. Ventral horns of gray matter contain motor neurons; dorsal horns contain cell bodies of sensory pathways.

White matter Dorsal horn Central canal Ventral horn

Cell Bodies Ventral Dorsal Horn

Figure 1-52

Retina Layered structure evident. Dark line of cells near top is pigment epithelium. Broad striped region represents photoreceptors (rods and cones), whose nuclei stain heavily immediately beneath. Below receptor nuclei lie synaptic region and a layer of nuclei belonging to bipolar cells. Bipolar cell output synapses onto ganglion cells, only a few of which appear near bottom. Axons of ganglion cells form optic nerve. (X100)

Pigmented epithelium Rods and cones Receptor nuclei Bipolar cell nuclei Ganglion cells

Organ Systems And FunctionsBasilar Membrane The Spiral Organ

Tectorial membrane Hair cells of Organ of Corti Basilar membrane

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Responses

  • reginard
    Where is the sensory horn?
    7 years ago
  • demsas kidane
    Are Ventral nerve root myelinated?
    7 years ago

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