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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.
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AlphaT
AlphaT posted in Debating:
"catsrcute9" wrote:. Sure, some people think they are in love when really it is lust but there are plenty of people, gay and straight, that love each other. I believe that it would be beneficial if we kinda cut down on the baby making. The more people on earth, that means that more resources are being used. In a way gays are doing you a favor. Odds are, early on, gays were most likely killed for being different. So it wasn't like they had to chance to evolve .   If gays/lesbians we made to have babies then gays would not even exist. Just because a century old book says that gays cant be married doesn't mean people are going to listen to it. Modify you bible to the now times. Rules change, so should your's. So....much....wrong.....
reply 19 minutes
mickey256
mickey256 posted in Say Anything:
cheating is a form of bullying. bullies are every where it is a nuisance we have to fight be the one to stand up
reply 24 minutes
Teh_Skittlez
Teh_Skittlez posted in Debating:
"tweenblogger" wrote:Yes, times have changed.  The feeling that most poeple feel is lust, commenly mistaken for love.   :annoyedBut also take in consideration that I am doing this from a christian standpoint. Why were the first poeple on earth adam and eve , man and women. And if gay poeple were supposed to marry, why werent they designed to make children? If everyone was gay we would have NOOOO children.  So I guess it's a good thing homosexuality isn't an infectious disease. It isn't contagious, you aren't going to catch the gay because we make it legal for them to marry.  In the United States, we have laws that are there to prevent you forcing your religious beliefs onto others. Those same laws protect you from having other religious beliefs forced on you. For the same reason it wouldn't be fair to ban you from eating pork because Islam teaches you not to eat pigs, it's not fair for you to say that gays shouldn't be allowed to marry because of the Catholic church's teachings. I don't care what your religion says, this debate is about what should be legal. Legally, there's no reason to prevent gays from getting married. The only reason is because of religion, which should have no influence on a secular government like that of the United States. 
reply 24 minutes
Teh_Skittlez
Teh_Skittlez posted in Debating:
"tweenblogger" wrote:I am a catholic and therefore it states in the bible it is man and women. What is the point for marriage? CHILDRENSOOO....YEAH! Dont be offensed So, we should then also deny marriage licenses to the elderly, women who are infertile, and couples who don't want kids. Since, you know, the point of marriage is just children, and not the bond between two people who love each other. 
reply 44 minutes
catsrcute9
catsrcute9 posted in Debating:
"tweenblogger" wrote:Yes, times have changed.  The feeling that most poeple feel is lust, commenly mistaken for love.   :annoyedBut also take in consideration that I am doing this from a christian standpoint. Why were the first poeple on earth adam and eve , man and women. And if gay poeple were supposed to marry, why werent they designed to make children? If everyone was gay we would have NOOOO children.  Sure, some people think they are in love when really it is lust but there are plenty of people, gay and straight, that love each other. I believe that it would be beneficial if we kinda cut down on the baby making. The more people on earth, that means that more resources are being used. In a way gays are doing you a favor. Odds are, early on, gays were most likely killed for being different. So it wasn't like they had to chance to evolve .   If gays/lesbians we made to have babies then gays would not even exist. Just because a century old book says that gays cant be married doesn't mean people are going to listen to it. Modify you bible to the now times. Rules change, so should your's.
reply about 1 hour

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