NATS 1675 Lecture Notes - Lecture 23: Immunoglobulin A, Glycolipid, Passive Immunity
Document Summary
Nats 1675 lecture #23 the lymphatic system and immunity continued. The most important aspect in the lymphatic system is fighting diseases. An infection is a condition caused by the presence of a disease causing agent a pathogen. Pathogens include viruses and microorganisms such as bacteria (refer to figures 8. 1 & 8. 4 in the textbook), fungi, protists and various parasites. The body"s defense mechanisms help to prevent the entrance of pathogens or act to destroy them if they do enter the tissue. These defense mechanisms are divided into two broad categories: non-specific. Non-specific mechanisms are general in that they protect against many types of pathogens. Specific mechanisms provide protection against particular pathogens, and they are responsible for the type of resistance we call immunity. It is a given kind of organism develops diseases that are unique to it. ex. , animal species other than human are generally resistant to the microorganisms that cause gonorrhea and syphilis: mechanical barriers.
