Blood Questions

• Are there any parts of the human body that get oxygen directly from the air and not from the blood?
• Does licorice cause high blood pressure?
• How can the heart be strong enough to pump blood up your legs against gravity?
• Is human blood ever any color other than red?
• Why are veins blue?
• Why do camera flashes make your eyes turn red?
• Why does every cell in our body contain DNA?