What are the types of innate defenses?
The innate immune system includes:
- Physical Barriers. such as skin, the gastrointestinal tract, the respiratory tract, the nasopharynx, cilia, eyelashes and other body hair.
- Defense Mechanisms. such as secretions, mucous, bile, gastric acid, saliva, tears, and sweat.
- General Immune Responses.
What are the innate internal defense mechanisms?
Internal Defenses. When pathogens enter the body, the innate immune system responds with a variety of internal defenses. These include the inflammatory response, phagocytosis, natural killer cells, and the complement system. White blood cells in the blood and lymph recognize pathogens as foreign to the body.
What is the mechanism of innate immune system?
During infection, innate reactions develop before acquired immune reactions do. Natural immunity involves such reactions as the production of different cytokines, chemokines, and interleukins; the innate, cytokines-dependent nonspecific immunity of leukocytes; HLA-independent pathogen-killing cells, and phagocytosis.
What does the innate immune system defenses include?
In humans, the innate immune system includes surface barriers, inflammation, the complement system, and a variety of cellular responses. Surface barriers of various types generally keep most pathogens out of the body. If these barriers fail, then other innate defenses are triggered.
What are the 3 components of innate immunity?
Innate immunity is comprised of different components including physical barriers (tight junctions in the skin, epithelial and mucous membrane surfaces, mucus itself); anatomical barriers; epithelial and phagocytic cell enzymes (i.e., lysozyme), phagocytes (i.e., neutrophils, monocytes, macrophages), inflammation- …
What are the 4 major components of innate immunity?
This discussion will be used to develop an understanding for innate immunity and its four component defenses which are: anatomic barriers (skin and mucous), physiologic barriers (temperature, pH, and chemical mediators), phagocytic barriers (specialized cells), and inflammatory barriers (leakage of vascular fluids).
What is an example of innate immunity?
Examples of innate immunity include: Cough reflex. Enzymes in tears and skin oils. Mucus, which traps bacteria and small particles.