inside green line

villi (duodenum)

red asterik
blue arrows
green asteriks

villus
muscularis mucosae
submucosal tubuloacinar (Brunner’s) glands

green arrows

ganglion of the submucosal plexus (of Meissner)

blue asteriks
green asteriks
red arrows

inner circular muscle
outer longitudinal muscle
ganglion of the myenteric plexus (of Auerbach)

violet arrows

paneth cells
