Q. Why does singing make us hungry?
A. Singing increases respiration; and as more oxygen is introduced into the lungs, our food-fuel is more rapidly consumed.
Q. Why does reading aloud make us feel hungry?
A. Reading aloud increases respiration; and as more oxygen is introduced into the lungs, our food-fuel is more rapidly consumed.
Q. Why do we feel more hungry in the day-time than in the night-time?
A. As we breathe more slowly during sleep, therefore, less oxygen is introduced into the lungs to consume our food-fuel.
Q. Why do we need warmer clothing by night than by day?
A. 1st—Because the night is generally colder than the day.
2ndly—As our respiration is slower, our animal combustion is slower also; in consequence of which, our bodies are more cold.