Organ of immune system
The parts of body which comprises individual cells, entire organs and organ systems that help in protection from infection of pathogens (foreign bodies).
The organs of immune system are.
- Skin
- Mucous Membrane
- Lymphatic System
NOTE: Skin and Mucous Membrane are first line of defence and act as a physical barrier.
Some of Physical barriers are.
- Antibacterial substance: enzyme present in the Saliva, tears and their ways of respiratory system.
- Mucus: present in the bronchi that helps to move out germ, bacteria via the hair like projection structure called Cilia.
- Stomach acid; hydrochloric acid (HCL) present in stomach helps to excrete out or dilute the bacteria and germs.
- Helping hands bacteria; Bacteria over the skin that helps to maintain the PH and temperature of the body and also kill the other bacteria and organism to protect the body.
Organ of Lymphatic System
- Primary lymphoid organs
- Bone marrow
- Thymus
- Secondary lymphoid organs
- Lymph nodes
- Spleen
- Tonsils
Primary Lymphoid Organs:
Differentiation and maturation of lymphocytes takes place.
- Stem Cell Niche (SCN): The Microenvironment where any stem cells self-generate and differentiate to perform cellular functions very well.
Bone Marrow
The spongy like a structure in the bone where differentiation and maturation of all Erythroid Cells, Myeloid Cells and B-lymphocytes cells occur.
