Question

Describe the various components(physical and chemical,cellular and extracellular components) defining innate immunity

Answer 1

The innate immune system is one of the two main immunity strategies found in vertebrates (the other being the adaptive immune system). The innate immune system is an older evolutionary defense strategy, relatively speaking, and it is the dominant immune system response found in plants, fungi, insects, and primitive multicellular organisms.[1]

The major functions of the vertebrate innate immune system include:

Recruiting immune cells to sites of infection through the production of chemical factors, including specialized chemical mediators called cytokines

Activation of the complement cascade to identify bacteria, activate cells, and promote clearance of antibody complexesor dead cells

Identification and removal of foreign substances present in organs, tissues, blood and lymph, by specialized white blood cells

Activation of the adaptive immune system through a process known as antigen presentation

Answer 2

Definition:

Immunity is the ability of the body to protect against all types of foreign bodies like bacteria, virus, toxic substances, etc. which enter the body.

Immunity is also called disease resistance. The lack of immunity is

known as susceptibility.