Simplify the following text for a Grade 14 native English-speaking person.
Original: Human biology is an interdisciplinary academic field of biology , biological anthropology , nutrition and medicine which focuses on humans ; it is closely related to primate biology , and a number of other fields .
Simplified: Human biology is an area of study that is part of biology , biological anthropology , and medicine which looks at humans ; it is closely related to primate biology , and a number of other areas .