What is the definition of function in biology?

The definition of function in biology specifically refers to the purpose or role of a body part or organ within an organism. Understanding function is key to grasping how different structures contribute to the overall operation and survival of an organism. For instance, the function of the heart is to pump blood throughout the body, supplying oxygen and nutrients to tissues. This concept distinguishes the function of a structure from its location or the processes it might be involved in, emphasizing how various biological parts work together to maintain life. The focus on purpose highlights the relationship between structure and function, an essential principle in biology that allows for a better understanding of anatomy and its implications for health and development.