What do blood and the city of Venice have in common? They both operate the same way: they are both a "floating city," if you will. Blood moves in a circular maze through the body, 24 hours a day, through a series of arteries, veins, and capillaries. The average person has about 1 to 1½ gallons (4-6 liters) of blood. The body makes blood-- red blood cells, which carry oxygen, white blood cells, which fight infections, platelets, which are cells that help stop bleeding, and plasma, a yellowish liquid that carries nutrients, hormones, and proteins throughout the body. And at the "heart" of the circulatory system? The heart of course!
February, the month of valentines and hearts, seems to be a great time to explore, with the Quirkles Yawning Yolanda, our amazing human body, and more specifically our circulatory system. Click News and Resources/Experiments to learn more.