You can go online and get all the factual information you want on every part of the human body. Put in the word “skin,” and you will be amazed at how much information there is about human skin. One comic said, “Your skin holds everything together.” In truth, it does much more than that.
We tend to classify humans based on their skin color, but our skin color is related to the needs of the body. Black objects radiate heat more efficiently than white objects. Take two identical cans and paint one black and the other white. Heat them to the same temperature and then let them sit in an insulated environment. The black can will cool off faster than the white can. Dark skin color is due to a biological pigment called melanin. Melanin absorbs ultraviolet light and thus protects the body. People living in tropical areas where they are exposed to more heat and ultraviolet light have more melanin than people living in cooler regions. There is, therefore, a latitude effect on skin color.
The more you study the design of your skin, the more amazing it is. One square inch of human skin contains nearly 20 million cells and 625 sweat glands. That square inch of skin can also have as many as 65 hairs, 19 feet (5.8 meters) of blood vessels, and 19,000 sensory cells. To limit bleeding, blood vessels in your skin temporarily shrink instantly if the skin is cut or if pressure is applied. Your body sheds skin cells when they die and replaces them with new ones. Three-quarters of the dust floating around your house is made up of dead skin cells.
So, if you think your skin holds everything together, and that’s all, you would be wrong. Your skin, the largest organ in your body, does a wide range of things that help you to stay alive and comfortable. When David wrote, “I will praise you, God, for I am fearfully and wonderfully made” (Psalms 139:14), he was not aware of many things about our bodies that we know today. As we look at ourselves with tools such as microscopes, we see design in the construction of our bodies that David could not have imagined.
— John N. Clayton © 2020
There is a wonderful book published in 1989 and now out of print that gives many other examples of the incredible designs we see in our bodies. The title is The Compass in Your Nose and Other Astonishing Facts About Humans by Marc McCutcheon and published by Jeremy Tarcher, Inc.