STAPES or STIRRUP BONE
- The stapes, or stirrup bone, one of the the three auditory ossicles in the middle ear, measure a tiny 2.6 - 3.4 mm ( 0.1 - 0.13 in ) in length and weight from 2 to 4.3 mg (0.03 - 0.066 grains ). The strapedius, the muscle that controls the stapes,is less that 0.127 cm ( 0.05 in ) long and is the smallest muscle in the human body.
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