How Blood Carries Oxygen 41u7

We all know that oxygen is the key to living. It's in the air you your body.

Blood and Oxygen - How It Works 1l4b5b

You breathe air in through your nose and mouth. It makes its way into your lungs and dissolves in the blood.

Blood and Oxygen - Types of Blood Vessels 5y5768

Three types of blood vessels carry blood from your lungs to every cell in your body.

• Arteries - Arteries have brain, kidneys and liver. Arteries get smaller as they get further from your heart. At their smallest point, arteries become capillaries.
• Capillaries - Capillaries are the tiniest blood vessels. They connect arteries to veins.
• Veins - Veins are what bring the "used" blood back to your heart.

Blood and Oxygen - Did U Know? 4h492t

• The only part of your body that has no blood supply is the cornea in the eye. It takes in oxygen directly from the air.
• A severe sunburn damages the blood vessels so badly that it takes four to 15 months for them to return to their normal condition.
• The human heart creates enough pressure to squirt blood 30 feet (nine meters) out of the body.

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