medical illustration of human anatomy of the circulatory system - 19th century - 血液流動 幅插畫檔、美工圖案、卡通及圖標人體, 心血管系統, 全身
doctor examining and diagnosis blood vessels and veins diseases. varicose veins treatment. - 血液流動 幅插畫檔、美工圖案、卡通及圖標
types of cholesterol in the blood concept. high-density lipoprotein (hdl) and low-density lipoprotein (ldl). - 血液流動 幅插畫檔、美工圖案、卡通及圖標膽固醇, 打字體, 低密度脂蛋白