types of cholesterol in the blood concept. high-density lipoprotein (hdl) and low-density lipoprotein (ldl). - 紅血球 幅插畫檔、美工圖案、卡通及圖標高密度脂蛋白, 三酸甘油脂, 脂肪細胞
normal artery and cholesterol blocked artery. clogged arteries caused by cholesterol. normal veins and varicose veins. - 紅血球 幅插畫檔、美工圖案、卡通及圖標阻塞, 血液流動
medical illustration depicting immune system interaction at cellular level. - 紅血球 幅插畫檔、美工圖案、卡通及圖標小徑, 開始鈕, 巨噬細胞