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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.
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Poll

What Causes Heart Disease?

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

General In The Forums

AlphaT
AlphaT posted in Debating:
"JaneDoe2" wrote: You're a Trump fan? Whatever gave it away?
reply 1 minute
ThatRandomChick719
(Oops I forgot to censor something earlier. Sorry KW) Section Seven Yoshiki Kishinuma was beyond panicked. He had to tell himself not to scream. He heard the clapping. But... Only two. Something happened to Morishige. He wouldn't mess around at a time like this. "Crap crap crap! MORISHIGE! Where are you?!" Before he could come to his senses, he felt someone tap his shoulder. "There you are, Kishinuma-kun!! Have you seen Suzume?" "H-huh?! Shinohara?" "Mhm! Seiko Shinohara, at your service!" "...What are you going on about? Did Suzumoto come with you...?" "Yeah! She told me Morishige-kun went to look for you. She was worried, and I decided to help her look for you two. So... Where is he?" "...That's what I want to know. Shinohara... Something happened to him." "...H-huh?!" "He was signaling me... But he didn't finish. He was supposed to clap three times, but he only clapped twice." Shinohara's eyes went wide. This couldn't be happening. Morishige, the loner... "...Well, where did he go?!" "Hmm... Over there. Near that trailer." "Let's go, Kishinuma!" "Right." He began to walk in the direction of the trailer. He made sure he was cautious and didn't make a lot of noise. Shinohara followed suit. They made it there after some time passed, and they noticed an insane looking guy standing around. He was tall, wearing black, and holding a bloody knife. "Su... Zu... Mo... To..." His tone then became a sing song. "You're going to regret going in there! Hehehehehehehe." Kishinuma approached the thug and punched him without hesitation. "What... Did you... Just say?!" "Ohoho! It's you! The guy that failed to protect his girlfriend! Yoshiki Kishinuma, right?" "...Shinozaki is not my girlfriend! Where are they? Her. Morishige. And Suzumoto. TELL ME!" "You won't like it. But you can go inside and look for yourself. Heheh... Please, do. I would love to see the look on your face! HAHAHAHAHA!" "...Kizami... What is wrong with you?!" Whatever, that didn't matter. He ignored whatever response Kizami gave and opened a window, and climbed inside. Shinohara was too torn as to what to do, so she stayed behind and ran off. He didn't blame her, though. It was freaky. And at this point... He could handle it on his own. "SHINOZAKI!!! MORISHIGE!!! SUZUMOTO!!!" No response. He decided to fire the big guns. "AYUMI 'CLASS REP' SHINOZAKI! SAKUTARO 'SHIG' MORISHIGE! MAYU 'SUZUME' SUZUMOTO! WHERE ARE YOU, DANG IT?!" He lost all composure and fell to his knees. They were nowhere to be seen... He cried. A lot. "Aww, come on! Don't leave me! That's not cool...!" As he continued wailing protests, he heard a familiar voice scream out. A male. "Kishinuma!!! Where are you...?! AND DON'T CALL ME SAKUTARO OR SHIG! I WILL GET YOU... Ugh..." Ah, Morishige. Kishinuma didn't even care that he was butt hurt. He was relieved to hear his voice. "I'm in this creepy trailer...! Wait! I'll follow the direction of your voice. Just hold on!" "No... Don't...!" Kishinuma didn't listen. He followed Morishige's voice until he reached a dimly lit room. This must be where the light was coming from... On closer inspection, he saw the three people he was looking for. Ayumi was laying across a table, and her eyes were open in horror. Morishige was stuck to a wall. He had cuffs on his wrists and ankles. Suzumoto wasn't trapped, just trying to free him. "Suzumoto! Are you getting it undone?!" "Yeah... Why don't you get the class rep?" Morishige protested. "Mayu, don't say that! Kishinuma... Don't do anything! Let me... Take care of it... Please..." "MORISHIGE! How... HOW COULD YOU SAY THAT?! That's the whole reason I came here! I WILL get her! Understand me?!" "...Kishinuma, I'm being serious! It's... For your own good!" "SHUT UP! I'm tired of your lies!" Morishige continued to protest, but Kishinuma ignored him. He walked over to Shinozaki, and noticed something. She had blood all over her uniform. She was paler than ever... And she didn't say anything. He bent down closer, and noticed she wasn't breathing. "...N-no..." Mayu finally freed Morishige, and they both watched him. "...WHAT DID THEY DO TO YOU... Shinozaki..." Mayu walked over to him. "...Why... Why don't we let Shig handle it?" "..." He didn't say anything else as he ran out of the trailer. He felt tears streaming down his face. Mayu followed him, and it didn't take long for Morishige to retrieve the body and catch up with them.
reply 17 minutes
Kirsteeeeen
This thread has been moved. Click here to see the new thread.
reply 26 minutes
JaneDoe2
JaneDoe2 posted in Debating:
You're a Trump fan?
reply about 1 hour
CaptJolee
"ThatRandomChick719" wrote: (Aww thank you!! And probably laziness and stuff XD) (XD)
reply about 2 hours