Summary

Frank Overton Applied Physiology, Including the Effects of Alcohol and Narcotics

Memory.—The mind lays away all its messages, and often looks them over again. These old messages are called memories. They always stay with the brain, and the mind can call them up at any time. Our memories make our knowledge.
Every act of the mind leaves some mark on the memory. We may not be able to bring it back when we want to, but it will come back some time. Every bad word and evil deed will tend to come back and make us bad again. Every good work and word will leave its memory and make us better. We ought to fill our minds with good memories.
Source: Gutenberg

Frank Overton Applied Physiology, Including the Effects of Alcohol and Narcotics

Need of nerves.—The cells of the mouth, stomach, and intestine digest food; the cells of the liver change the food to blood; the cells of the heart pump the blood to feed all the cells of the body; the red blood cells carry air for the cells to breathe; and the cells of the skin and kidneys carry away the waste of the rest of the cells. Each set of cells works for all the rest. If the cells of the body were only tied together, each one would do as it pleased, and no two would work together. But something tells each cell of the body to work with the others. The cells all obey the mind.
Source: Gutenberg

Frank Overton Applied Physiology, Including the Effects of Alcohol and Narcotics

Your face will be red, for the heart sends more blood to the working muscle cells. You will be short of breath, for the cells need more air. You will eat more, for your food is used up. Your muscles are like an engine. They get their power from burning food in their own cells. When they work they need to use more food and air. So working a muscle makes us eat more and breathe deeper. The blood flows faster, and we feel better all over. The muscle itself grows much larger and stronger.
If we sit still all day, the fires in our bodies burn low and get clogged with ashes. We feel dull and sleepy.
Source: Gutenberg

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