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.
Functions. 1- Absorb fats and fat-soluble vitamins from the digestive system and the digestive system and transport them to the cells 2- Return cellular waste products and excess fluid from the tissues to the circulatory system 3- Serve as an important part of the immune system.