Mus3

Frame 3 Slide 96 (Monkey duodenum, H&E). This micrograph concentrates on the muscularis externa. The inner circular layer of smooth muscle (c) that is cut in longitudinal section is in the middle of the micrograph, while the outer longitudinal layer (l) is above. In this micrograph, what is the plane of section of the outer longitudinal layer of smooth muscle? Between the two layers, one can observe several nerve cell bodies that are part of Auerbach's plexus (ap).