Before actual description have a loot at the video of Organs of Immune system from handwrittentutorials.com from the followinf link:

https://ourimmunesystem.webnode.in/videos/

Immune Organs - organs of the immune system

The immune system is composed of different immune organs, cells and tissues. For now, let’s see which immune organs(and tissues) make up the immune system and then move on to the cells. Why? Because, this way, we keep it short and it is easier to understand if we take it step by step.

• There are several different systems in the human body – nervous system, blood system, immune system, digestive system and so on.

• Occasionally, one system can engage in another or there can be overlapping between them.

• The lymphatic system is portion of the body's defense mechanisms. It takes on a huge role within the body's protection from an infection plus some other disease, like cancer.

• Because the lymphatic system is portion of the body's defence mechanisms, it is actually safe to make reference to one or another yet still stay on track and make sense of what we mean.

• The lymphatic system (just like the blood system), is portion of the circulatory system and yes it exists in parallel with the blood system, but has a fluid known as lymph, instead of blood.

• It generates and assists to handle materials - cellular material, protein, nutrition, waste material [1]

A number of morphologically and functionally diverse organs and tissues have various functions in the development of immune responses. These can be distinguished by function as the primary and secondary lymphoid organs. The thymus and bone marrow are the primary (or central) lymphoid organs, where maturation of lymphocytes takes place. The lymph nodes, spleen, and various mucosalassociated lymphoid tissues (MALT) such as gut-associated lymphoid tissue (GALT) are the secondary (or peripheral) lymphoid organs, which trap antigen and provide sites for mature lymphocytes to interact with that antigen. In addition, tertiary lymphoid tissues, which normally contain fewer lymphoid cells than secondary lymphoid organs, can import lymphoid cells during an inflammatory response. Most prominent of these are cutaneous-associated lymphoid tissues. Once mature lymphocytes have been generated in the primary lymphoid organs, they circulate in the blood and lymphatic system, a network of vessels that collect fluid that has escaped into the tissues from capillaries of the circulatory system and ultimately return it to the blood.[2]

Understand more from the following video:

Video: https://ourimmunesystem.webnode.in/videos/

Reference: Microbiology , (Immunity) , Video explaining Cells and organs of immune System. Submitted by Prof.Dr Ahmed Abdel Aziz.

References

[1] Organs of the immune system from immune-system-expert.com

[2] Kuby, 5^th edition, Unit 2: Cells and organs of immune system, pg 43, Immunology.