6 Fun facts about the circulatory system:
If you stretch out all the arteries, veins, and capillaries; they will stretch out to 100,000 KM in distance, and this distance circles the Earth 2.5 times. The capillaries make up about 80% of the length, even though they are the smallest of all blood vessels. blood cells are roughly the same length and width as capillaries. Capillaries are 8 micros or 1/3000 inches big. However, some capillaries are smaller than blood cells, which forces these blood cells to change and distort shapes in order to go through these capillaries.
The heart can still beat, even though if it is separated from the body. The heart can still beat outside from your body because it generates its own electrical impulses. If the
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The earliest evidence dates back to 1600 B.C in an ancient Egyptian medical document. The document states that there is a connection between the arteries and the heart in a physiological way. The document also states that if a person breathes air it comes to the lungs, and then the air enters the heart and rushes into the arteries. The Egyptians believed that the heart gives you feelings of emotions, wisdom and memory rather than the brain. Egyptians when they mummify their kings, they actually remove the heart and store it in a jar, but the brain is discarded rather then being put in the jar.
Physicians have been following the circulatory model incorrectly for over 1500 years. In the year 200 A.D, a Greek physical and philosopher named Galen of perigean had an idea for what the circulatory system looks like, so he proposed a model. He said that circulatory system has 2 types of blood; venous and arterial these types of blood have different roles and functions. He said that the circulatory system has 2 pipelines of one way systems of blood distribution. He also stated that the liver makes venous blood that the body actually uses. He said that the heart sucks the blood rather than pumping