Gas exchange is the process by which oxygen and carbon dioxide (the respiratory gases) move in opposite directions across an organism's respiratory membranes, between the air or water of the external environment and the body fluids of the internal environment.
niche. The function or position of a species within an ecological community. A species's niche includes the physical environment to which it has become adapted as well as its role as producer and consumer of food resources.
(March 2016) (Learn how and when to remove this template message) Soft skills is a term often associated with a person's EQ (emotional intelligence quotient), which is the cluster of personality traits that characterize one's relationships with other people.