Almost immediately after tissue is injured

Almost immediately after tissue is injured - material and...

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Almost immediately after tissue is injured, blood vessels temporarily constrict at the site of injury. Constriction of capillaries helps reduce bleeding and restricts the movement of any microbial toxins present. Innate or nonspecific immunity exists at the time of birth. Occurs as a physiological reaction whenever an injury occurs or any kind of foreign substance enters the body. Acquired immunity is when the body is expoed to a specific substance or microbe canned an antigen. When exposure occurs, the immune system develops antibodies, which are specific proteins that trigger the immune system to launch its defenses. Gastrointestinal transmission occurs by ingestion, either eating or drinking food or water contaminated with infectious microorganisms. We can ingest many different types of foreign
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Unformatted text preview: material and bacteria each day, which can quickly invade the tissues of the intestine and proliferate. E coli is naturally found in the intestine, however, a recent outbreak in Germany has claimed the lives of more than 19 people when they ingested more than their body could handle. Intact skin, mucous membranes, serves as a barrier against the transmission and spread of infection. Specific skin tissues have specialized abilities to defend the body against infection. Normal flora prevent bacterial entry into deeper tissues. Skin appendages such as the eyelashes and nasal and ear hair prevent contamination by dust and droplets. Mechanism begins when a blood vessel is injured. Vasospasm occurs, the blood vessel retracts and constricts and reduces blood flow through the vessel....
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This note was uploaded on 11/26/2011 for the course HCA 220 taught by Professor James during the Spring '08 term at University of Phoenix.

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