10. The lymphatic system (Humeral system)
- Lymphatic system
This system provides a natural defense to the body. It kills bacteria, viruses, and other parasites residing in the body.
It comprises fluid lymph, lymph nodes, lymph organs (like the spleen, tonsils, thymus,) white blood cells, and antibodies (humeral substances).
The lymphatic system is arranged parallel to the blood circulation and widely distributed in important points of the body.
You can find it in the intestine, kidney, liver, brain, etc. where it traps the pathogens and prevents their further spread by destroying them.