Book excerpt: Let's talk about blood! Blood is more than the red stuff that comes out when you cut yourself. It is what carries nutrients and other things through your body. Without blood you would shrivel up and die! So let's find out more about this stuff. In a grown man or woman there are about five or six quarts (litres) of blood. That's a lot. But what is blood? Blood is really made up of lots of different things. There is plasma, red blood cells, white blood cells, and lots of other stuff. Let's look at the parts of your blood. Find out more about your blood and blood vessels in this short 15-minute book. Ages 8 and up. All measurements in American and metric. Reading level: 4.0 LearningIsland.com believes in the value of children practicing reading for 15 minutes every day. Our 15-Minute Books give children lots of fun, exciting choices to read, from classic stories, to mysteries, to books of knowledge. Many books are appropriate for hi-lo readers. Open the world of reading to a child by having them read for 15 minutes a day.