human small intestine

histopathology magnification histological lymphocytes photographs micrography photograph muscularis adventitia absorption intestinal absorptive connective microscope publishing scientific embryology structural intestine submucosa digestion digestive education histology cytoplasm lavender duodenum clinical membrane cellular medicine pattern drawing cartoon textile jejunum anatomy vessels medical fibrous purple circle sketch violet design flower mucosa system goblet tissue health nature nuclei stroma serous organs human small organ lilac petal ileum villi cells blood basal basic