這將刪除頁面 "If an Enemy Germ Invades You"。請三思而後行。
Red blood cells, or erythrocytes, contain the hemoglobin that carries oxygen and carbon dioxide across the body. Hemoglobin provides pink blood cells their Characteristic color. When it's oxygen-rich, it appears reddish
這將刪除頁面 "If an Enemy Germ Invades You"。請三思而後行。