Smallest muscle in the body-
Stapedius: the muscle that activates the stirrup, the small bone that sends vibrations from the eardrum to the inner ear. It measures just .05 inch in length.
Largest muscle in the body-
Latissimus dorsi: the large, flat muscle pair that covers the middle and lower back--and looks like wierd bat wings on body builders
Longest muscle in the body-
Sartorius: the straplike muscle that runs diagonally from the waist down across the front of the thigh to the knee.
Strongest muscle in the body-
Gluteus maximus: the muscle pair of the hip that form most of the flesh of the buttocks.
Fastest-reacting muscle in the body-
Orbicularis oculi: the muscle that encircles the eye and closes the eyelid. It contracts in less than .01 seconds.
Number of muscles used to smile-
Number of muscles used to frown-