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Facts About The Human Blood

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Did you know that your body has over 60,000 miles of blood vessels? It only takes blood averages of twenty seconds to leave the heart travel through the body and then return back to the heart. Blood accounts for about seven percent of the human body weight. There are more interesting facts about blood that follows.

Composition

Blood has several different parts. It consists of red bloods cells, white blood cells, platelets, and plasma. The plasma makes up about 55% of blood, but did you know that plasma is 90% water? Each component has a specific role.

Blood cells

Red blood cells are the ones that carry oxygen to the body from the heart. It picks up oxygen in the lungs then travels to the heart and then out to the rest of the body. The journey from the heart to the body and back takes about eight seconds. Red blood cells also carry other nutrients. The white blood cells are the largest cells, and their sole purpose is to protect the body from harmful foreign substances. They attack and kill germs and viruses that enter the body. Platelets are what cause blood clots. They stick together and form clots to protect the body from bleeding out from a wound. And the plasma is what transfers all the cells through the body.

Importance

Blood is very important to the body. There are no substances that can replace blood. When someone donates blood, the blood is separated and is used to help four different people. Blood carries nutrients to the body and also carries waste to kidneys, lungs and liver for it to be disposed of.

Blood clots

A blood clot in the blood is not a good thing, if it gets stuck in the brain it will cause a stroke and if it is caught in the heart it will cause a heart attack. A traveling blood clot is called a thrombosis. There is a second type of clot is called an embolism. These types of clots are stationary, although if they get too big they will block arteries and can cause serious health problems.

More on human blood

  1. Discovery of blood groups
  2. Debate: cord blood banking