What is tissue fluid ? How does it differ from blood ? Write its important functions.

Explanation

The fluid present in the spaces existing between the cells in the tissues is called tissue or interstitial fluid. Its composition is very similar to that of the blood plasma except that it lacks blood corpuscles and plasma proteins to which the capillary walls are not permeable.
Functions. Tissue fluid acts as a middle man. It hands over food materials and oxygen from the blood to the tissue cells and receives `CO_(2)`, nitrogenous wastes, hormones and other synthetic substances from the tissue cells and discharges them into blood.
It also keeps the tissue cells moist.