-
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.

Red blood cells Red blood cells

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.

Heart character with pointing

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

wowtragic
wowtragic posted in New Users:
Heyyyy guys. New here. I'm 17, pan, FTM trans. I'm not sure how all of this works but Id love some friends to help me figure it out haha. 
reply about 1 hour
-ItsYourGirl
-ItsYourGirl posted in General:
I've encountered each and every one of these types of people on your list, @-Oracle-. Also, I think I'm letter D, the observer. xD
reply about 1 hour
Lolly20
Lolly20 posted in General:
funny people :p :p :p
reply about 4 hours
-Oracle-
-Oracle- posted in General:
∆ Killuminati
reply about 4 hours
-Oracle-
-Oracle- posted in General:
Interesting
reply about 4 hours