5.3 Subdivisions of immunity

what are the divisions of immunity?

1. innate immunity also known as non-specific immunity

2. Adaptive immunity also known as specific or acquired immunity

what is innate immunity?

• a type of immunity that is present from birth and is fasting acting but not long lasting and produces non-specific (generic) responses against classes of pathogens

what is adaptive immunity?

an immune response that is specific to a particular antigen and develops through contact wiht an antigen

what I immunological memory?

ability of the adaptive immune response to remember antigens after primary exposure

what is different about innate and adaptive immunity?

innate is not antigen specific and adaptive is

innate is present from birth whereas adaptive develops only after infection or after immunisation

innate has no memory of prior infections and adaptive have memory of prior infections

what are the subdivisions of immunity?

1. cell mediated immunity

2. humoral immunity

what is cell mediated immunity?

immune response that is mediated by immune cells - providing a direct attack against pathogens

what is humoral immunity?

immune response hat is mediated by soluble molecules in the blood, lymph and interstitial fluid disable pathogens

what are lymphocytes ?

class of white blood cells found in all tissues including blood, lymph nodes and spleen which ply a role in specific immunity

what are neutrophils?

the most common type of while blood cel one kind of phagocyte

what is the first line of defence?

psart of the defence against pathogens provided by barriers of the innate immune system that prevents entry of pathogens into the body

what is the second line of defence?

part of the defence provided by the immune cels and soluble proteins of th binate immune system against pathogens that gain entry to the body

what is the third line of defence?

part of the defence provided by the immune cells of the adaptive immune system through the various actions of cells