Cells at Work!

Stagione 2

This is the story inside your body. The number of human cells is about 37 trillion. The cells are still working well today in the world of human body. Red blood cells that carry oxygen, white blood cells that fight germ, and then, there are some unknown cells as well. With the advent of new cells, bacteria and viruses, the story offers a brand new development!©AS/K,A,D

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