What is the focus of '-poiesis' in medical terminology?

The suffix '-poiesis' in medical terminology is derived from the Greek word "poiēsis," which means "making" or "formation." This term is commonly used to refer to the process of production or creation within a biological context. For instance, in terms like hematopoiesis, which pertains to the formation of blood cells, '-poiesis' clearly indicates the focus on the process of making or producing blood.

The other choices do not relate to the meaning of '-poiesis.' Breathing refers to respiration processes, spitting relates to the expulsion of saliva, and pressing does not correlate with the concept of formation at all. Thus, the focus on formation accurately captures the essence of what '-poiesis' represents in medical terminology.