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The human heart

Updated: Jul 26, 2020

The heart is one of the fundamental organs that make up our bodies. It pumps blood throughout our bodies while providing oxygen to our cells along with other nutrients. They also help us to get rid of waste that harms our bodies. Humans need a constant supply of nutrients (which the heart can transport via our blood vessels or the circulatory system) to stay alive, so without our heart we would die.


The human heart is split into 4 different chambers. The two on the top are called Atriums/Atria (sing. Atrium), the bottom two are referred to as ventricles. So in all, the four parts would be called, the right atrium, the left atrium, the right ventricle, and finally the left ventricle. (To make this a bit less complicated, I will simply refer to these chambers as RA, RV, LA, and LV.)


It is important to note that when drawing a diagram of the heart, always make sure that you have flipped the two directions. If this unclear, read this example: on the left side of your diagram you would draw the right atrium and right ventricle. On the right side of the diagram is where the left atrium and left ventricle would be drawn.


This image was supplied by Wikipedia

https://en.wikipedia.org/wiki/File:Diagram_of_the_human_heart_(cropped).svg

Notice how the diagram's direction is flipped.



The heart is made of Cardiac muscles. I will not go into too much depth on Cardiac muscles but to put it simply, there are three different types of muscles: Skeletal (or Striated), Smooth and Cardiac muscles. Both cardiac and smooth muscle movement is involuntary. This means that the movement of the muscles is uncontrollable by sheer will. The third type of muscle tells a whole different story. The third type is skeletal, sometimes reffered to by its technical term: Striated. Skeletal muscles are controllable by our thoughts and we use them to move and walk around.


This is was supplied by Research Gate

https://www.researchgate.net/figure/The-three-types-of-muscle-Striated-cardiac-muscle-is-expressed-exclusively-within-the_fig1_328339210

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