An abscess is a collection of pus in any part of the body. In most cases, the area around an abscess is swollen and inflamed. Abscesses occur when an area of tissue becomes infected and the body's immune system tries to fight it. White blood cells (WBCs) move through the walls of the blood vessels into the area of the infection and collect in the damaged tissue. During this process, pus forms.
Define casting: something (such as the excrement of an earthworm) that is cast out or off; the act of one that casts: such as â casting in a sentence something (such as the excrement of an earthworm) that is cast out or off; the act of one that casts: such asâ¦ See the full definition
A fossil skeleton is not hard to understand, it is mineralized bone. Impressions are similar to pressing a leaf in a book to dry and preserve it. A cast is a little different. A cast is defined as: The secondary rock or mineral that fills a natural mold, producing a replica of a fossil. (emphasis added) Bates, R. L., Jackson, J. A., editors, (prepared by the American Geological Institute), 1976, Dictionary of Geological Terms, third edition; Anchor Books (Doubleday).