Biological anthropologists study the human body, how it works, and how it developed. Some physical anthropologists work with living populations and try to understand the diversity of the human form, others use their skills to identify the remains of the dead while still others study the development of living primates, including humans. Because physical anthropologists deal with the human form and because archaeologists occasionally find the remains of human beings on their sites, physical anthropology and archaeology are sometimes very closely related.
From Staeck, J.P., 2001, Back to the Earth: An Introduction to Archaeology. Mountain View: Mayfield.