| Lab 8 Peripheral Nervous System: 1) Index 2) Introduction 3) Things To identify 4) Nerve and Nerve Fibers 5) Nerve & Nerve Fibers II 6) Nerve & Nerve Fibers III 7) Dorsal Root Ganglion 8) Sympathetic Ganglion 9) Parasympathetic Ganglion 10)Practical |
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PARASYMPATHETIC
GANGLION
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| #68 - Auerbach's plexus, human intestine, H&E |
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This slide is a section through the small intestine. Examine this section carefully. Be certain to recognize and identify the types of epithelium, connective tissue and muscle present. Between the outer longitudinal and inner circular coats of smooth muscle, you will see small groups of neurons distinguishable by their large nuclei and prominent nucleoli. These cells form the myenteric (Auerbach's) plexus, one of the nerve networks controlling intestinal movement. Reference: Gartner, p. 289, Fig. 2 Wheater, p. 129, Fig. 7.19 Ross, p. 461, Fig. 16.19 (EM) |
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This is a section taken from the intestinal lining. The green arrow is pointing to the inner circular layer of smooth muscle, and the red arrow is pointing to the outer longitudinal smooth muscle layer. Between these two layers in the GI Tract, you will find Auerobach's Plexus. The blue arrow is pointing to the huge Mutlipolar neuron located in the plexus. You can see that this huge cell sticks out like a sore thumb. If you look carefully between any section of intestine you can find the plexus between these two layers of smooth muscle. Red arrow - Outer Longitudinal Layer Green arrow - Inner Circular Layer Blue arrow - Parasympathetic Motor Neuron |
Aurobach's plexus |
