Why Do We Have Body Hair?
Hair is a thread-like outgrowth arising from the skin of mammals. Collectively hairs are often referred to as fur. Hair consists of dead ce
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Cells
How Does Your Body Make Blood?
The blood that our hearts pump through our bodies is composed of cells and plasma. The cells include red blood cells, white blood cel
When Was Braille Invented?
The Braille system of reading and writing was invented by a Frenchman named Louis Braille, in about 1829. It is an alphabet consisting of a
What Is Cork and How Is It Produced?
Cork is an extremely versatile natural material that is made from the bark of the cork oak tree. It is composed of dead cells that accumulat
What Does Waterlogged Mean?
Wood becomes waterlogged when all its cells are filled with water. It can absorb water only up to about 30 percent its own weight. As it doe