Simplify the following text for a Grade 13 native English-speaking person.
Original: While undisputed boundaries do not exist , human biology is typically distinguished from conventional medical research by an enhanced focus on international , population-level perspectives on health , and on human evolution , adaptation , and population genetics rather than individual diagnosis .
Simplified: There are not exact boundaries between human biology and regular medical research . However , human biology usually focuses more on health for an entire group of people , and on human evolution , adaptation , and population genetics rather than individual health .