Fertility is the actual output of reproduction, and fecundity is the potential output
Is a system that connects with skeletal muscle v<span>oluntary controls the body movements. </span>
We know fatigue can cause drowsiness and so can the other so my best guess is drowsiness
Smooth and cardiac are involuntary.
Skeletal is voluntary.
Fitbits, smart watches and pe'dometers can monitor heart-rate.