As per the definition of the word, biology is the study of life. This means that a biologist studies the process that allow life to exist, the conditions that must exist for life to be sustained, the way that organisms survive and much more.
A healthcare professional's involvement with biology is essential. Because of biology, a healthcare professional is able to understand the processes occurring inside the human body to achieve different goals, and also the problems that may occur with these processes and how to treat them.