Facts about Human Blood

Blood is the life giving fluid that delivers oxygen to the cells of the body. It is a specialized type of connective tissue that consists of red blood cells, platelets, and white blood cells suspended in a liquid plasma matrix. Other than this human blood has interesting facts.

1. Your body contains about a gallon of blood

The adult human contains approximately 1.325 gallons of blood. Blood makes up about 7-8 percent of person's total body weight.

2.Blood consists mostly of plasma

Blood circulating in your body is composed of 55 percent plasma, 40 percent red blood cells, 4 percent platelets, and 1 percent white blood cells.

3. Importance of White blood cells in Pregnancy

The certain white blood cells called macrophages are necessary for pregnancy to occur. Macrophages are prevalent in reproductive system tissues. Macrophages assists in the development of blood vessels network in the ovary, which is vital for the production of the hormone progesterone.

4. Blood contains Gold

Human blood cells contains metals atoms including iron, chromium, manganese, zinc, lead, and copper. The human has about 0.2 milligrams of gold that is mostly found in the blood.

5. Blood cells have different life spans

Matured human blood cells have varying life cycles. Red blood cells circulate in the body for about 4 months, platelets for about 9 days, and white blood cells range from a few hours to several days.

6. No nucleus and mitochondria in Red blood cells

Mature red blood cells do not contain a nucleus, mitochondria or ribosomes. The absence of these cell structures leaves room for the hundreds of millions of hemoglobin molecules found in red blood cells. 

7. UV rays reduce Blood Pressure

Exposing a person's skin to the sun's rays reduces blood pressure by causing levels of nitric oxide to rise in the blood.