The three layers are: external intercostal muscles, internal intercostal muscles, and the innermost intercostal muscles. These muscles are innervated and supplied with blood by the intercostal nerves, intercostal veins, and intercostal arteries.hey raise the ribs and expand the chest cavity, and originate from ribs one through 11, with insertion from ribs two to 12. The internal intercostal muscles are responsible for forced exhalation. They depress the ribs and decrease space in the chest cavity.
synergism (sinÂ´urjizÉm), n a joint action of two drugs in such a manner that one supplements or enhances the action of the other to produce an effect greater than that which may be obtained with either one of the drugs in equivalent quantity or produce effects that could not be obtained with any safe quantity of either drug, or both.
syndicalism. (sÄ­n`dÄ­kÉlÄ­zÉm) , political and economic doctrine that advocates control of the means and processes of production by organized bodies of workers.Like anarchists, syndicalists believe that any form of state is an instrument of oppression and that the state should be abolished.yndicalism. 1. a revolutionary movement and theory advocating the seizure of the means of production and distribution by syndicates of workers through direct action, esp a general strike. 2. an economic system resulting from such action.