Is it true that substances are carried from the blood in capillaries to tissues in a liquid called tissue fluid? What is the extracellular fluid in most tissues is called? What is a tissue fluid?   Tissue fluid is the the fluid that surrounds the bodies cells, or technically it bathes the cells in the body or cleans them.
The most important function of immune system is to defend the body from different disease causing pathogens. Whenever there is pathology in human body, immune system is activated to protect the vital tissues from harm.
The human immune system is a very complex system build up of numerous functional parts. To understand how the immune system works it is essential to know the functional parts and their rolle in the system therefore we will list you the functional parts and what rolle they play in the immune system.