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.
Noun. 1. mind-that which is responsible for one's thoughts and feelings; the seat of the faculty of reason; his mind wandered; I couldn't get his words out of my head. psyche, nous, brain, head. cognition, knowledge, noesis-the psychological result of perception and learning and reasoning.