Abscesses occur when an area of tissue becomes infected and the body's immune system tries to fight it. White blood cells move through the walls of the blood vessels into the area of the infection and collect within the damaged tissue. During this process, pus forms.
cognition cogÂ·niÂ·tion (kÅg-nÄ­sh'Én) n. The mental faculty of knowing, which includes perceiving, recognizing, conceiving, judging, reasoning, and imagining.
knowledge. n. 1. the facts, feelings or experiences known by a person or group of people. 2. the state of knowing. 3. awareness, consciousness, or familiarity gained by experience or learning.. Metaphysics. the doctrine that the reality of perceived external objects is known intuitively, without the intervention of a representative idea. 2. Metaphysics. the doctrine that knowledge rests upon axiomatic truths discerned intuitively.