14 Interesting Facts about Blood

Facts about Blood

Some interesting facts about blood found in humans and animals. Blood is the life-giving and an incredibly important bodily fluid that carries oxygen and various nutrients to our body cells.

Read below for 14 interesting facts about blood.
  1. One ounce (29.57 Milliliters) of blood contains 150 billion red blood cells.
  2. A pint of blood contains 2.4 trillion red blood cells.
  3. A human body produces 17 million red blood cells per second. If stress is needed, the body can produce up to 7 times that amount. (Up to 119 million red blood cells in every second).
  4. Blood makes up about 7% of human body weight. 
  5. The size of a red blood cell is about 7 microns. (1 micron is 1 millionth of a meter).
  6. It takes only 20 to 60 seconds for a drop of blood to travel through the heart, through your body, and back again to the heart.
  7. Blood consists of red blood cells, white blood cells, and platelets.
  8. Red blood cells develop in the bone marrow and circulate in the body for about 120 days.
  9. Red blood cells have the important function of carrying oxygen around the body. They also contain a protein called haemoglobin. Haemoglobin contains iron which together with haemoglobin and oxygen gives human blood red colour.
  10. Cows have 800 or possibly more blood types.
  11. The most common blood type in the United States is O positive (39% of the population), while the least common blood type is negative only (0.5% of the population).
  12. In the United States, patients use about 32,000 pins every day.
  13. Not all are blood red. Crabs have blue blood. Earthworms and lychees have green blood. Many invertebrates, such as starfish, have clear or yellowish blood.
  14. Every 5 minutes, a patient from the Ozark area hospital gets a blood transfusion supplied by the CBCO donor.

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