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.
soft skills. The term describes those personal attributes that indicate a high level of emotional intelligence. Unlike hard skills, which describe a person's technical skill set and ability to perform specific tasks, soft skills are broadly applicable across job titles and industries.