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?