PATHOLOGY

Detailed explanation-1: -The innate immune system provides a general defense against harmful germs and substances, so it’s also called the non-specific immune system. It mostly fights using immune cells such as natural killer cells and phagocytes (“eating cells”).

Detailed explanation-2: -The macrophages and neutrophils of the innate immune system provide a first line of defense against many common microorganisms and are essential for the control of common bacterial infections. However, they cannot always eliminate infectious organisms, and there are some pathogens that they cannot recognize.

Detailed explanation-3: -The Autonomic Nervous System The CNS regulates immune function, inflammation, and pathogens responses against host tissues, through the production of inhibitory cytokines, hormones, and other soluble molecules able to signal to the brain, which in turn exerts strong regulatory effects on the immune response (5, 32).

Detailed explanation-4: -The immune system is a complex network of organs, cells and proteins that defends the body against infection, whilst protecting the body’s own cells.

Detailed explanation-5: -Lymph nodes contain immune cells that analyze the foreign invaders brought into your body. They then activate, replicate and send the specific lymphocytes (white blood cells) to fight off that particular invader. You have hundreds of lymph nodes all over your body, including in your neck, armpits, and groin.