The direction muscle fibers run is called the what?

longitudinal axis of the muscle, or body part with which the muscle is associated. The term rectus implies that the fibers or muscle is oriented straight with respect to the longitudinal axis. The term oblique means that the orientation is at an angle to the longitudinal axis.Relative size

Can you list the drugs that you want answered for? i think maybe your answer could be a or b. but i’ll never know till you post the rest of this question.