Human Anatomy: The Heart

by Kaia Cross, Taylor Ashcraft, Siddha Sannigrahi

What Does The Heart Look Like?

The heart is a hollow muscle that pumps blood throughout the blood vessels, by repeated rythmic contraction. The heart is located under the rib cage, to the left of the breastbone (sternum) and between the lungs. Your heart is an amazing organ. Shaped like an upside-down pear, this fist-sized powerhouse pumps five or six quarts of blood each minute to all parts of your body.
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What Is The Heart?

The heart is the so called "fountain of life" for the human body. When you are a kid, your heart is the size of your fist, however when you an adult it doubles in size. Your heart beats 35 million times a year and about 100,000 times a day and 2.5 billion times a lifetime. A sink faucet would need to be turned on for 45 years to equal the amout of blood the heart pumps in a lifetime. A healthy heart pumps on average 2,000 gallons of blood each day. Every day the heart creates enough energy to drive a truck 20 miles. In a lifetime, that is equivalent to a trip to the moon and back. Do you know what makes the "thump" "thump" sound in your chest, well its the heartbeat, but the heartbeat is caused by your 4 valves closing!

How Does the Heart Work Exactly?

The heart is a chambered muscular organ that pumps blood throughout the body, located towards the left center of the chest. The heart pumps blood that is received from the veins into the arteries, all the arteries and take the blood throughout the body giving nutrients to the other body systems. The heart is a very vital organ and if removed would cause a dramatic down spiral is the body’s wellbeing. If cut, then no blood would be pumped throughout the body, the entire body would suffer none of the other organs\systems would get any nutrients.


Brain Pop- Science- The Heart

What is the Circulatory System?

The circulatory system absorbs nutrients from the small intesine and transports them throughout the body. It also circulates oxygen to the body and removes carbon dioxide waste. It takes 20 seconds for a red blood cell to circulate the whole body. In a tiny drop of blood there are five million red blood cells. About 8 million blood cells die every every second and the same amount are born. Red blood cells may live for about 4 months, circulating the body, feeding the 60 trillion other cells. The blood travels through the viens, back to the right side of the heart where it is pumped directly to the lungs.

What Happens If the Heart is Gone?

Well to some this may be a silly question, and most of us know the answer, we die. However, do you know what causes this death? Probably not, it is a combination between hypoxia and necrosis, do you know what it means? Well, hypoxia is when oxygen is not present in the body, and the cells in your body stop functioning. Though the respitory system brings in oxygen, the bloodstram carries that oxygen to other parts of your body. Now necrosis, necrosis is when nutrients can not  get through to other parts of the body, when necrosis occurs nutrients from the food, do not get absorbed by the villi. This is a probem becuase this would then lead to malnutrition and then everything that goes along with it such as your bone health would soon suffer.
The Circulatory Song!

If I Can't Get Rid Of the Heart, What Do I Get Rid of?

The appendix, in some ways the appendix is useless, and scienctists have proven that we can live without. At some point the appendix was needed, but in modern times the foods we eat are easier to digest. The appendix in earlier times were used to digest things like raw vegetation, but of course today we are not likely to pull out grass from the ground and eat it. Also the fact that we do not use the appendix anymore, makes an appendix much more vulnerable to disease, which causes a swollen appendix, and that comes with excruciating pain, which then leads to a burst appendix, if not treated carefully, this appendix can cause death.

How Does the Heart Affect Other Body Systems?

The heart affects most, if not all body systems in some way or the other, I am going to talk about mainly the digestive and respiratory systems. In the digestive system the food that we eat gets broken down into nutrients, right? Well, when absorbed by the villi, theses nutrients go into the blood stream, without the heart pumping out blood how will the nutrients get to where they need to be? The answer is, they can't. Similarly the oxygen coming from your lungs, get put into the bloodstream as well and again I'm going to ask the same question, where does it go without the blood? It's the same answer, it simply can't and won't get to the other various parts of the body.
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