-
x

Meet New Friends!

Recommended friends are based on your interests. Make sure they are up to date.

Friends
Kidzworld Logo

How Blood Carries Oxygen

We all know that oxygen is the key to living. It's in the air you breathe, in your lungs and in your blood. What you might not know is how oxygen gets into your blood and how the blood carries oxygen through your body.

Blood and Oxygen - How It Works

You breathe air in through your nose and mouth. It makes its way into your lungs and dissolves in the water lining of the alveoli. Oxygen then clings to red blood cells as they pass through the alveolar capillaries - now the oxygen is in the blood.

Blood and Oxygen - Types of Blood Vessels

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

  • Arteries - Arteries have muscular walls that pump oxygen-filled blood away from your heart to the tissues and organs, like the 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?

  • 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.
Related Stories:
10 Comments

Related Stories

Micro_blood-article
You know what blood is: it's that red stuff that oozes out if you get a cut. The average person h...
Cutting is a type of self-injury that is a serious problem. If you cut, or know someone who does,...
As kids spend more time in front of the computer and TV, their levels of physical activity have d...
F1140558168296

Number of Breaths You Take Every Day?

  • 15,400.
  • 21,600.
  • 33,500.
  • 47,200.

Random In The Forums

rainbowpoptart
"Unrung" wrote:Well if you ask me, it's pretty obvious: the cat and the basket are one. Fused together in some freak accident in a science lab. See, it's screaming because it has to deal with the perpetual existential question of why it was created, to which it can find no comforting answer. why why why why why why why (seeing that word so much makes it look weird. hm.)
reply about 2 hours
Unrung
Unrung posted in Say Anything:
Well if you ask me, it's pretty obvious: the cat and the basket are one. Fused together in some freak accident in a science lab. See, it's screaming because it has to deal with the perpetual existential question of why it was created, to which it can find no comforting answer.
reply about 3 hours
Pink_Cool_Girl
Pink_Cool_Girl posted in General:
Swimming, maybe playing some fun sports. But don't get overheated- Stay inside too sometimes!I quote from Diary of a Wimpy Kid:"People expect you to be frolicking around in the summer. And when you don't, they thing something I wrong with you."
reply about 5 hours
jordand08
jordand08 posted in General:
Hanging out at the beach, and exploring... Depends on where you're vacation is.
reply about 5 hours
LovelyPurpleUnicorn
I'm shorter compared to almost everyone  :(
reply about 7 hours