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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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What Causes Heart Disease?

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

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ThePaleWalker636
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IlikeGUYS20
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How about-It's a great place to make friends- It's a great way to stay in touchHope that helps!
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drowning
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"According to the famous theory in quantum mechanics, 'The universe doesn't exist if we stop looking at it,' which argues that a particle's past behavior changes based on what we see. Last year, scientists performed a new experiment proving this theory to be true on the scale of atoms.   'The bizarre nature of reality as laid out by quantum theory has survived another test, with scientists performing a famous experiment and proving that reality does not exist until it is measured.'   According to the rules of quantum mechanics, the boundary between the 'world out there' and our own subjective consciousness are blurred. When physicists look at atoms or particles of light, what they see depends on how they have set up their experiment. To test this, physicists at the Australian National University recently conducted what is known as the John Wheeler's delayed-choice thought experiment. The experiment involves a moving object that is given the choice to act like a particle or a wave. Wheeler's experiment then asks - at which point does the object decide? Common sense says the object is either wave-like or particle-like, independent of how we measure it. But quantum physics predicts that whether you observe wave like behavior or particle behavior depends only on how it is actually measured at the end of its journey. 'It proves that measurement is everything. At the quantum level, reality does not exist if you are not looking at it,' said Associate Professor Andrew Truscott. Despite the apparent weirdness, the results confirm the validity of quantum theory. Quantum theory governs the world of the very small, and has enabled the development of many technologies such as LEDs, lasers and computer chips. The ĀNU reversed Wheeler's original concept of light beams being bounced by mirrors, and instead used atoms scattered by laser light."
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