pathway

A path.

A course usually followed by a body part or process.

A chain of nerve fibers along which impulses normally travel.

A sequence of enzymatic or other reactions by which one biological material is converted to another.

A path; usually, a narrow way to be passed on foot; also, a way or a course of life.

A footpath; a beaten track; any path or course. Also used figuratively.

A footpath or other path or track

A sequence of biochemical compounds, and the reactions linking them, that describe a process in metabolism or catabolism

a trodden path