Here are some examples of how it's used:
* Hematopoiesis: The process of blood cell formation.
* Histopoiesis: The process of tissue formation.
* Osteopoiesis: The process of bone formation.
* Spermatogenesis: The process of sperm cell formation.
* Neuropoiesis: The process of neuron formation.
So, when you see the suffix "-poiesis", think of it as indicating a creation process within a biological system.