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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.

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.

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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Number of Breaths You Take Every Day?

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

General In The Forums

LUCYQWERTY123
LUCYQWERTY123 posted in Random:
"Nisya-" wrote:It would be a... super-fast-wings so I could fly anywhere and anytime :D SAME!!!! :punk 8) :D [s:p/zxl]
reply 20 minutes
irisboulevard
irisboulevard posted in Random:
Teleportation. 
reply about 2 hours
Fairkss
Explanation: Hoshi was best friends with the moon girl, Sina who secretly loved him but they drifted apart when Hoshi met Dimitre, a Russian boy. He hung out with Dimitre more and they both fell in love with each other. However, Sina was jealous and so she got Cira, the sun girl, who was in love with Dimitre to distract him and hang out with him. Dimitre was too kind to reject her so he just hung out with her. In the shadows, Sina was bullying and threatening Hoshi not to meet with Dimitre because if he did she would hurt Dimitre. One day Hoshi couldn't handle it and so he ran to find Dimitre after school. He saw Dimitre and went towards him only to get hit by a car. Dimitre saw Hoshi lying on the floor and rushed towards him and hugged him while Hoshi slowly died in his arms. Dimitre never got over his death after that point.
reply about 6 hours
Fairkss
There once was a boy named Hoshi. Just like his name his smile was as bright as the stars in the sky. One day he met another boy who's eyes were a mixture of the aqua ocean and green land, Earth. His name was Dimitre and he came from a far away land. They fell hard for each other. Their love stronger than anything in the galaxy. The star left the moon's side to join hands with the earth in their journey of love. But a girl carrying a name that meant the moon felt jealous. Jealous of the stars love for the Earth. She wanted to make it so that Hoshi could never meet Dimitre again, and with the help of another girl with her sun-kissed hair, the star could never see the Earth. The sun would blind the Earth so much that he couldn't see Hoshi who would shine brightly with teary eyes, and then when the sun would go to sleep so did the Earth, and only the stars would feel pain. Months went by and Hoshi's heart only broke harder and harder until a plan popped in his brain. The star, lost and all alone, cut off the wings that allowed him to shine and he fell out of the sky with hot fiery pain. Dimitre saw Hoshi in his hurt and painful state and embraced him. They could finally be together. Only for a brief moment, until Hoshi could feel himself slip into a deep sleep wrapped in Dimitre's arms. The star had gone out, and had left a gaping hole in the Earth's heart that could never be filled.
reply about 6 hours
nqme
nqme posted in Debating:
I appreciate it, but that doesn't help my conscience.  To me, you're practically saying "if one of us dies, that's okay because there are still plenty of other humans all around the world".  I don't put other animals above us, of course, but they still exist.  Anyway, good day.  Enjoy this egg's before  [s:p/1n9v] and after  [s:p/1n7e] because I'm not sure how to say "good day" without sounding sarcastic.
reply about 7 hours