medical illustration of a human heart and position of surrounding lung lobes - 19th century - 橢圓形突起物 幅插畫檔、美工圖案、卡通及圖標
human thyroid gland on white background. endocrine system anatomy and healthcare concept - 橢圓形突起物 幅插畫檔、美工圖案、卡通及圖標新陳代謝, 健保和醫療