Flashcards in Non-specific Body Defences Deck (4)
What is a physical defence?
Closely packed epithelial cells found on the surface of skin and lining the body's digestive and respiratory system offer a physical barrier against bacteria and viruses
What is a chemical defence?
Secretions including tears, saliva, mucus and stomach acid are produced against invading pathogens (disease causing microorganism)
An inflammatory response is caused by what?
By a physical injury such as a cut or invasion of microorganisms
Following injury, mast cells found in the connective tissue become activated releasing large quantitates of histamine, a chemical which causes vasodilation and capillaries to become more permeable
The increased blood flow leads to accumulation of phagocytes and clotting elements at the site of infection