What is immune cell??? And where it is located how it works
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Cells of the Immune System
The response to pathogens is orchestrated by the complex interactions and activities of the large number of diverse cell types involved in the immune response. The innate immune response is the first line of defense and occurs soon after pathogen exposure. It is carried out by phagocytic cells such as neutrophils and macrophages, cytotoxic natural killer (NK) cells, and granulocytes. The subsequent adaptive immune response includes antigen-specific defense mechanisms and may take days to develop. Cell types with critical roles in adaptive immunity are antigen-presenting cells including macrophages and dendritic cells. Antigen-dependent stimulation of various cell types including T cell subsets, B cells, and macrophages all play critical roles in host defense.
#LOCATION: The immune system is everywhere, in your blood, lymph nodes, spleen, bones, etc etc.
#The immune system protects the body against disease or other potentially damaging foreign bodies. When functioning properly, the immune system identifies and attacks a variety of threats, including viruses, bacteria and parasites, while distinguishing them from the body’s own healthy tissue.
The Lymphatic system consists of bone marrow, spleen, thymus and lymph nodes.
Bone marrow produces white blood cells, or leukocytes.
The spleen is the largest lymphatic organ in the body contains white blood cells that fight infection or disease.
The thymus is where T-cells mature. T-cells help destroy infected or cancerous cells.
Lymph nodes produce and store cells that fight infection and disease.
Lymphocytes and leukocytes are small white blood cells that play a large role in defending the body against disease.
The two types of lymphocytes are B-cells, which make antibodies that attack bacteria and toxins, and T-cells, which help destroy infected or cancerous cells.
Leukocytes are white blood cells that identify and eliminate pathogens .