-
x

Meet New Friends!

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

Friends ff8c072dd79a91c1300f032d674241a8d64367100ffb1f25fa3f9bec4a05319f
Kidzworld Logo

The Ins and Outs of the Heart

When most peeps think of the word "heart" they think of love, romance and all that mushy stuff. Those things are great and all, but let's also give your heart props for what it really is - an amazingly powerful life-sustaining organ.

Pump Up the Oxygen

To put it simply, your heart is a pump. Much like that gizmo in your fish tank, your heart moves liquid from one place to another. In the process, the heart re-oxygenates the blood moving through it with the oxygen you breathe in. This is an essential process cuz your blood supplies oxygen to your entire body. If you don't get oxygen for more than a few minutes, you'll die.

Basic Anatomy

Your heart is a cone-shaped muscle in the middle of your chest, right between your lungs. The average adult heart weighs between 9 - 10.5 ounces (255 - 298 grams) and it pumps about 1,900 gallons (7,200 liters) of blood every day. The heart has three layers: the endocardium (outside layer), the myocardium (middle layer) and the pericardium (the fluid sack that surrounds the heart). The heart is also divided up into four chambers, which each have a valve that allows blood to flow in, but prevents blood from flowing backwards.

In Action

The heart squeezes blood out and into the rest of the circulatory system when it contracts. When it expands, it sucks in poorly oxygenated blood and pushes through the chambers and into the pulmonary artery, where it is re-oxygenated. Then the blood makes its way out of the heart via the aorta and back into the body where it provides your cells with oxygen.

Did U Know?

  • In the average person's life, their heart will beat 2.5 billion times.
  • Heart disease is the leading cause of death in North America. More than 2,000 Americans die from heart disease everyday.
  • Your heart is about the size of your fist.
Related Stories
17 Comments

Related Stories

Micro love micro
Shay asks: “Love? Is that a real thing, or not? I looked it up in the dictionary, and there was n...
Micro dating micro
NSN678 asks: "I asked someone to go out with me and I don't know if we are cause he's giving all ...
Micro friend micro
sakotako asks: "I have this HUGE crush on this guy in my class. He’s been my friend for a really ...
Poll

What Causes Heart Disease?

  • Genetics.
  • Eating too many high-fat foods.
  • Smoking.
  • All of the above.

General In The Forums

XxRuby_PhoenixxX
"rainbowpoptart" wrote: "AwesomeIvysaurGirl34" wrote: "XxRuby_PhoenixxX" wrote: *hugs you back* legit one person said happy birthday to me last year so this year is a lot better on here (: *cough* me *cough* Waiiit, but I said happy birthday to her last year, too. So it was at least two people who said it, right? Oh xD honestly I only remember one person saying HB, so I guess maybe 2-3 people said it? Idk but I'm happy more people did this year ^-^
reply 43 minutes
Mermaid_Author14
Dude omigosh.... I was thinking about writing something at exactly midnight (your time) when I realized.... It was a few seconds before Harry's eleventh birthday. Right when the clock struck midnight... *Reads through Harry Potter and the Sorcerer's Stone again* Hagrid came to the Hut on a rock where Harry and the Dursleys were staying... Gave him a letter from Hogwarts... That's what I feel about this situation.... Ruby, you're a wizard... (Or witch... I think the guys are wizards and the girls are witches...)
reply 43 minutes
rainbowpoptart
rainbowpoptart posted in Random:
reply about 1 hour
rainbowpoptart
rainbowpoptart posted in Random:
"AwesomeIvysaurGirl34" wrote: "XxRuby_PhoenixxX" wrote: *hugs you back* legit one person said happy birthday to me last year so this year is a lot better on here (: *cough* me *cough* Waiiit, but I said happy birthday to her last year, too. So it was at least two people who said it, right?
reply about 2 hours
XxRuby_PhoenixxX
No I randomly put question marks, LOL. And YES! SOON  IVY WE WILL BE THE SAME AGE YOU WILL NO LONGER BE ABLE TO USE LEVEL TWO OF AGEISM H A  H A  H A
reply about 2 hours