Which organs make up the immune system? Other than your nervous system, your immune system is the most complex system in your body. It’s made up of tissues, cells, and organs, including: Your tonsils. It is made up of different organs, cells , and proteins that work together.
The immune system is made up of several organs that affect growth and development.
These organs include: Adenoids: glands in the back of the nasal passage. Bone marrow: soft tissue found in bone cavities. Spleen: an organ in the abdominal cavity.
Some of the main organs involved in the immune system include the spleen, lymph nodes, thymus, and bone marrow. Immune system, the complex group of defense responses found in humans and other advanced vertebrates that helps repel disease-causing organisms (pathogens ). Immunity from disease is actually conferred by two cooperative defense systems, called nonspecific, innate immunity and specific, acquired immunity. A weakened immune system can lead to diseases including cancer, the flu and chronic fatigue syndrome.
Allergies occur when your immune system mistakes harmless substances for threats and attacks these harmless substances.


