action force definition, action force meaning | English dictionary. action. 7 the operating mechanism, esp. in a piano, gun, watch, etc. n (Physics) the supposed interaction of two separated bodies without any intervening medium.
The myometrium is the middle layer of the uterine wall, consisting mainly of uterine smooth muscle cells (also called uterine myocytes), but also of supporting stromal and vascular tissue. Its main function is to induce uterine contractions.
1 They can do a short, single contraction (twitch) or a long, sustained contraction (tetanus). 2  Smooth muscle is found in your digestive system, blood vessels, bladder, airways and, in a female, the uterus. 3  Smooth muscle has the ability to stretch and maintain tension for long periods of time.