Hello, little scientists, I am Professor Bill Tyson and together we are going to know different forms of science. Today we are going to talk about those component structures of all living things. They are the smallest part of any organism: I am speaking of the cells.
The name "cell" was first used by an English scientist named Robert Hooke (1665). Through a microscope, he was observing fine cuts of cork, which is a type of bark. Hooke saw that the cork formed small compartments, which he called "cella", which means chamber in Latin.
Over time the microscopes became better and we discovered that all living beings are formed by cells. Some living beings, even, are formed by a single cell, being very small. When a being is formed by a single cell, we call it a unicellular.
But if they are made up of more than one cell, we call it pluricellular. We humans have more than 50 trillion cells in our body. Wow!
Too many cells, huh? But they are very small. To get an idea, you can put ten thousand cells on the head of a pin.
Human cells are divided into about one hundred and thirty types. Each of these cell types performs a different but very important function for the functioning of our body. Now, I'm going to eat something, there are many cells to nourish.
For now, it's just personal, see you next time. Ah! Before I forget!
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