Top 5 Interesting Facts about Blood
Know your Body

Interesting Facts about Blood - Part I

Dr.Surya Rao Poodipeddi profile Authored by Dr.Surya Rao Poodipeddi on 9 Feb 2014 - 14:35.

Blood is the lifeline of our very existence. It is interesting as well as important to find out how it functions and what its role is, in the proper functioning of our body. Blood flows through the closed tubular structures called arteries and veins. The arteries carry pure blood from the heart to the periphery and the veins carry impure blood from the periphery to the heart. The only exception is pulmonary vessels, where the pulmonary artery carries impure blood and the pulmonary vein, pure blood.
Functioning of the blood: Around five liters of blood circulates through the blood vessels and the same quantity of blood from the heart is pumped to the periphery and brought back to the heart. This cycle occurs around 72 to 80 times per minute and repeats itself relentlessly from birth till death continuously. That is probably why the heart is labeled as the most faithful servant of the body.
The main blood vessel is called the aorta which branches out from the left ventricle of the heart and further branches out to supply pure blood to every part of the human body. They end up in minute vessels called capillaries, which discard waste products that are carried by the venules (vein ends).
The veins carry the impure blood back to the heart, this time emptying in the right auricle of the heart. From the right auricle the impure blood reaches the right ventricle and from thence to the lungs for purification and returns to the left article and through it to the left ventricle for supply to the whole body. This cycle continues to repeat.
Blood flows through the arteries and contains blood cells, minerals, proteins vitamins, hormones, glucose, fats, amino acids, water and all the drugs administered into the body. 
Interesting facts about blood:
The blood flow mechanism is very unique, and the statistics amaze us. Some facts are:
  • The blood flow travels more than one lakh kilometers taking into account the onward and the backward route it travels every minute of the day.
  • The blood flow acts as a scavenger carrying millions of waste products and supplying the essential elements such as minerals, proteins, vitamins et. to every single cell in the human body. 
  • Every cell in the human body is a customer to the blood flow which total to around 60 trillions equivalent to about 15000 times the number of inhabitants living on earth!
  • The blood flow also carries disease-causing bacteria as well as bacteria-killing medicaments. It carries food to the fetus via the placenta and also excretes all that is harmful for the baby as it grows in the mother’s womb. 
  • One of the most important ingredients the blood carries is the red blood cell. During a blink of the eye, around one million of these red cells die after completing their life span of around 100 to 120 days only to be replenished by the bone marrow which produce an equal number of red cells. In its lifespan each red cell will make around 70 to 75 thousand round trips from the heart to other parts of the body carrying oxygen.
Let's find out more about the blood in the second part which talks about the various blood types and the blood disorders.
*Disclaimer: This is not medical advice. The content is for educational purposes only. Please contact your doctor for any health care issues.