What is tissue fluid made up of?
1 Answer
Tissue fluid refers to extra cellular fluid which bathes the cells of most tissues, arriving via blood capillaries and being removed via the lymphatic vessels.
Explanation:
The main components of this extracellular fluid (ECF) is the instertitial fluid that bathes cells. The ECF is the internal environment of all multicellular animals, and in those animals with a blood circulatory system, a portion of this fluid is blood plasma. Plasma and instertitial fluid are the two compartments that make up at least 97% of ECF. The lymph makes up a small percentage of the instertitial fluid. The remaining small portion of the ECF includes the transcellular fluid (about 2.5%).
Instertitial fluid consists of a water solvent containing sugars, salts, fatty acids, amino acids, co enzymes, hormones, neurotransmitters, WBC's and cell waste products. The composition of instertitial fluid depends upon the exchanges between the cells in the biological tissues and the blood. Thus tissue fluids have a different composition in tissues of different areas of the body. The ionic composition of the instertitial fluid and blood plasma vary due to Gibbs-Donan effect. This causes a slight difference in the concentration of cations and anions between the two fluid compartments.
The plasma and lymph act as the delivery system and the instertitial fluid is important for water and solute exchange with the cells. The transcellular fluid includes the acqueous humour, synovial fluid, cerebrospinal fluid, serous fluids, and other gut fluids, as well as perilymph and endolymph in the inner ear.
