sentence: Humans interact with each other in their natural environment on a constant basis.
sentences_before: From one point of view, humans are a prime example of nature, and are the most widely studied natural inhabitants of the planet earth.
sentences_after: Every part of nature  everything from the air to the dirt on the ground  is interdependent. Medicine studies humans in health and sickness.
concept_name: human
headings: Nature
categories: Bionics