BIOL-2230 Chapter 21: Textbook Notes
10 Mar 2017
School
Department
Course
Professor
Document Summary
The body relies heavily on two intrinsic defense systems that act both: the innate (nonspecific) defense system is always prepared, responding, the adaptive (specific) defense system functions to attack particular. The innate and adaptive systems release and recognize many of the same. The innate responses are not as nonspecific as once thought. Although certain organs of the body are intimately involved in the immune. Although we consider them separately, the innate and adaptive systems always independently and cooperatively to provide resistance to disease, or immunity. within minutes to protect the body from foreign substances. Barricades. the first line of defense is the external body membranes intact skin and mucosae. The second line of defense, called into action whenever the first line has been penetrated, relies on internal defenses such as antimicrobial proteins, phagocytes, and other cells to inhibit the invaders" spread throughout the body. The hallmark of the second line of defense is inflammation. foreign substances.
