Every living thing in the world is made of cells. Every cell, no matter who it belongs to, has a very specific job that it has to perform. Most of the time, these single special cells group together to form something bigger; something that also has a specific job. That something those cells create is organ tissue. Every organ is made up of this special tissue (which is made up of those special cells). And all of these organs come together to create a specific organ system. There are all kinds of organ systems. In just your body, there are 10 major systems, each having at least two organs working together to perform a task. Can you think of any of these systems that you use everyday? How about your respiratory system, which allows you to breathe and includes organs like your lungs. Or what about your digestive system that includes your stomach and intestines? All of these systems work together to create one very special form of life: you! Isn't it neat to realize that there are so many little things that go into creating one big you?
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