The Anatomy of Immunity

Physical barriers, such as the skin epidermis and mucous membranes, serve as the first line of defense by preventing the entry of pathogens into the body.

Examples of chemical barriers include sebum, stomach acids, lysozyme, urinary tract acids, and acids in the vagina.

Neutrophils are a type of leukocyte involved in non-specific immunity. They are the most abundant type of white blood cell and can react to any pathogen regardless of antigen type.

<p>Lymphocytes, which make up 20-40% of all leukocytes, play a crucial role in specific immunity. They create memory cells after the first encounter with an antigen and respond only to a particular antigen type that fits their receptor.</p> Signup and view all the answers

<p>Central lymphoid tissues are sites of primary lymphocyte production and maturation, playing a vital role in the development of the immune system.</p> Signup and view all the answers