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The Human Heart.
Hello Friends, welcome to a new Happy Learning Video. Today, we’re going to get to know the engine in our body, today we’re going to get to know the human heart.
The heart is the most special muscle which we have. It’s situated a little to the left from the center of our chest, between our lungs and is in an oblique position, positioned diagonally.
We say that it’s very special because it sends blood all over our body. Blood delivers oxygen and nutrients we need to live to all of our cells.
Our heart is a type of pump, like the ones we use to inflate the wheels on our bikes, the only thing is, that instead of pumping air, it pumps blood.
The heart is divided into two parts. The right part and the left part, separated by a cellular wall, so they are not connected internally.
Each one of these parts has two chambers or cavities. The upper cavities are called right and left atrium. And the lower cavities are called right and left ventricle. The heart also has four kind of doors which are called valves. These valves open to let blood in and then they close so this blood can’t go back.
Now we’ve got to know the most important parts of the heart. But… Do you know how it works?
It all commences, in the right atrium, where the deoxygenated blood, meaning it has very little oxygen and nutrients, it enters the heart, then it goes past the first valve up to the right ventricle. Once it is here, the heart sends the blood directly to the lungs. And it’s in this moment, where the blood is oxygenated and is filled with oxygen and nutrients. When it is already oxygenated, it goes back to the heart reaching the left atrium, from where it will pass through the third valve until the last cavity, the left ventricle. Finally, the heart sends this now oxygenated blood through the fourth and last valve towards the rest of the body… and it starts again!!!
To understand how our heart beats, we only need to imagine that our hand is a heart and that when it opens up it fills up with blood, and when it’s closed it pumps that blood outwards.
When blood exits our heart, it flows through our whole body through blood vessels and there are three types: arteries, veins and capillary vessels.
Arteries deliver oxygen and nutrient rich blood to all organs in our body, veins take that blood, low in oxygen, back to the heart and the capillary vessels, which are very small, connect arteries with veins and cells.
Fun Fact! Do you know approximately how much a human heart weighs? Well it’s 450 grams, almost half a kilo.
The truth is that the heart is the engine in our circulatory system and is an incredibly strong muscle, it’s able to beat more than 100 thousand times a day. So cool!!!
We can’t say goodbye without giving you a tip! WE need to take care of our hear and that’s why we need to do physical exercise, we need to eat healthy foods, and please, never ever smoke, it’s the worst thing you can do to hurt your heart.
Goodbye Happy Friends! See you in the next Happy Learning Video!