While both terms relate to change over time, they have distinct meanings in physiology:

* Development refers to the growth and differentiation of an organism from a single cell (zygote) into a complex, functioning being. This includes changes in structure, function, and behavior.

* Evolution refers to changes in the genetic makeup of a population over generations. This leads to the development of new species or adaptations within existing species.

In physiology, development is focused on the individual organism's changes during its lifespan, while evolution focuses on changes in the population as a whole over generations.