A: ### Quick Answer

**According to Brookhaven National Laboratory, one unit of blood is roughly equivalent to one pint.** With just one pint of blood, up to three lives can be saved.

Brookhaven National Laboratory explains that within one unit of blood there are several components, including red blood cells, white blood cells, plasma, platelets and cryoprecipitate. Each component of blood can be stored for differing amounts of time, with plasma lasting the longest. While red blood cells carry oxygen to the body's organs and tissue, white blood cells are the body's primary defense against infection. Platelets help blood to clot. Each ill person requires differing amounts of the components that make up blood depending on his condition.

Learn more about Fractions & PercentagesSources:

- Q:
## Who discovered fractions?

A:

Full Answer >**Fractions first appeared in the works of Egyptian mathematicians in the form of unit fractions, unlike the ratios used today.**They did not enter Europe until the 17th century.Filed Under: - Q:
## How many thirds make a whole?

A:It takes three-thirds to make a whole unit. As a fraction, three-thirds is written as 3/3, which literally means three divided by three, which is then simplified as one. A fraction is a part of a whole, and a whole is equivalent to the figure one.

Full Answer >Filed Under: - Q:
## What is a unit fraction?

A:

Full Answer >**A unit fraction is a fraction where the top number, known as the numerator, is one, and the bottom number, known as the denominator, is any positive number.**Additionally, the denominator must be an integer, or round number.Filed Under: - Q:
## How long does it take for blood to regenerate?

A:

Full Answer >**For each pint of blood lost, the human body takes 24 hours to regenerate plasma and four to six weeks to replace red blood cells, according to the American Red Cross.**Filed Under: