cross section of stomach. light micrograph showing stomach epithelium

anatomy background biology biopsy cells clinical columnar disease education epithelial epithelium gastric gastroenterology gastrointestinal giemsa health histology human intestinal intestine isolated macro magnification medical medicine microbiology micrograph microscope microscopic microscopy mucosa organ pathology photomicrograph physiology pits pyloric pylorus research science section slide stomach surface system texture tissue tract white