Cross section of a circular fold of the human duodenum seen under a microscope, at x50 magnification.人類腸臟
close-up of good bacteria. human small intestine and magnifying glass. human internal organ. - 人類十二指腸 幅插畫檔、美工圖案、卡通及圖標小腸, 插圖, 健康的生活方式
pancreas with human gallbladder on a gray background. human anatomy. human organs. health. healthcare. an alternative view of human anatomy. - 人類十二指腸 個照片及圖片檔內臟 - 內部系統
