The bodies of healthy human beings are destroyed to a lesser extent but the beings feel a natural tiredness in the evening a state that vanishes after a good nights sleep in which the natural wear and tear on the nervous system or wiring is repaired

Please fix the punctuation.
The bodies of healthy human beings are destroyed to a lesser extent, but the beings feel a natural tiredness in the evening, a state that vanishes after a good night's sleep, in which the natural wear and tear on the nervous system or "wiring" is repaired.