A Human body works as a joint force to keep the entire system running, running properly. But, as a force our body needs a general to guide and govern the entire system. A substance that brings oxygen to the entire body parts, removes wastes, fights germs and disease. Ring any bell? Yep! Blood it is. Without it, our body is like a car without fuel. There are many surprising facts about blood that you might not know. We provided those facts for you.
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An average human body has over 62,000 miles of blood vessels, if laid end to end it is approximately same as two and a half times of the total circumference of the earth. The Capillaries which enable the exchange of water and chemicals between blood and tissues, account for about the 90% of total length of blood vessels in the human body.
Image source: wikimedia
The four main types of blood cells, namely A, B, AB and O, each of them have either positive or negative Rh factor. Blood group AB is the universal recipient, while O negative is the universal donor.
During a full lifetime, a human heart can pump 1.2 to 1.7 million barrels of blood. The variation depends on the life expectancy of human.
One microliter of human blood contains erythrocytes (red blood cells), leukocytes (white blood cells), thrombocytes (platelets) and plasma. By volume erythrocytes constitute about 45 percent of total blood, leukocytes and thrombocytes combine only for 0.7 percent and plasma is about 54.3 percent.
While there are conceptions around, that coconut water can be taken intravenously as a substitute for blood plasma at times of emergency, but its high level of potassium can causes irresistible side effects through the whole body when taken. Several studies also prove that the coconut does not resemble to blood plasma, but closer to the fluid inside red blood cells.
Our body has about 0.2 milligrams of gold, and most of it is in our blood. However, it is not enough to make one wealthy.
The blood in our body accounts for approximately 7 percent of total body weight. An adult body, weighing 180 pounds (81 kg) contains 4.5 to 5.5 liters of blood.
While there are many notions around that mosquitoes prefer a certain type of blood, type “O”, but many surveys and studies proved that mosquitoes does not have any sort of blood preference.
During pregnancy, women have as high as 50 percent more blood by week 20.
The first U.S president, George Washington was a firm believer in bloodletting, which was a standard medical practice for treating illness. He eventually died because of this.
A newborn baby has just about one cup of blood in his/her body.
If a person started donating blood at age of 17 and donated after every 56 days until the age of 76, he/she would have donated a total of 48 gallons of blood.
People who have been badly injured in car accidents can need blood transfusions of 50 pints or more of red blood cells. While a severe burn victims can need 20 units of platelets during their treatment.
After donating blood, body replaces those red blood cells within 3 to 4 weeks and it takes eight weeks to restore the iron content lost after donating.
After donating a pint of blood (a pint is equal to a pound) you lose a pound but without loosing your strength.
The Bororo people in Brazil share same blood type “O” like the rest of native Americans.
During winters when our body gets cold, our nose receives more blood to keep it warm that causes the vessels to dilate and produce more mucus, which result running nose.
HP printer ink is more expansive than the human blood. To compare, take an example of HP 45 black ink cartridge comes in for 30$ for 42 ml, which is $0.71 per ml. On the other hand 500ml blood cost 200$ pricing 0.40 per ml.
The blood is considered to be an indicator of personality in Japan. The Japanese version of Facebook has “blood type” dropdown for profiles.
The human cornea does not have any blood supply it extracts oxygen directly from the air.
A blood-borne disease is one that spread through the spreading of contaminated blood. For example, HIV, hepatitis B/C, and viral hemorrhagic fevers.
When looking into the bright blue sky, some of you may notice several tiny bright dots moving along squiggly lines. Those are mostly short- lived and moving fast for short distances in seemingly curvy paths. These are actually white blood cells moving in the capillaries in front of the retina of our eye. It is also known as the Blue field entoptic phenomenon or Scheerer’s phenomenon.
A single blood cell can make a complete circuit of the human body in 20 to 30 seconds.
Image source: lifedaily
There is an estimation that around 1.2 million mosquitoes, each sucking at once will completely drain the human body blood.
A Pus or simply pimple is formed from dead leukocytes (white blood cells) while resisting infection in the body.
Read: 12 Worst and Deadliest Diseases in the World
The blood sucking creature also has their vegetarian community, male mosquitoes do not drink blood and female does.
While there are mainly four blood group, but blood centers often run short of type O and B group.
Just around three gallons of blood supports the entire nation’s blood needs for one minute (depends on the size of the nation).
Donated red blood cells must be used before 42 days of collection. While Plasma can be frozen and used a year long.
In 1658 Dutch naturalist Jan Swammerdam was the first person to observe red blood cells under a microscope. Further, in 1842 French physician Alfred Donné discovered platelets. The following year, leukocytes were first observed and discovered by Gabriel Andral and William Addison.