Tissue Fluid


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Tissue Fluid

 

(also called interstitial fluid), the fluid in the intercellular and pericellular areas of tissues and organs in animals and man. Tissue fluid bathes all tissue elements and, together with the blood and lymph, constitutes the body’s internal medium. The cells absorb necessary nutrients from the tissue fluid and discharge metabolic products into it.

The chemical composition and the physical and biological properties of tissue fluid differ in the various organs and correspond to the organs’ morphological and functional characteristics. Tissue fluid is similar to blood plasma, but contains less protein (about 1.5 g per 100 ml) and different proportions of electrolytes, enzymes, and metabolites. The composition and properties of tissue fluid have a specific homeostasis, which protects organ and tissue cells from the effects of changes in blood composition.

Nutrients essential for the tissues enter the tissue fluid from the blood, and metabolites are removed from the tissue fluid through the histohematic connective tissue barrier. When the tissue fluid flows from the organs into the lymphatics, it becomes lymph. The volume of tissue fluid in a rabbit amounts to 23–25 percent of the body mass; in man it amounts to 23–29 percent, with an average of 26.5 percent. Many histologists regard as tissue fluids the cerebrospinal fluid, the pericardial fluid, the fluid of the anterior chamber of the eye, and the fluid of the pleural cavity.

References in periodicals archive ?
Taking into account the effect of surface tension at the gas-liquid interface, and tissue fluid dynamic viscosity, the Laplace's equation that represents the pressure balance on the gas-liquid interface is [3,16]
A Excessive squeezing of capillary beds during capillary blood collection adds tissue fluid to the specimens in variable quantities.
Studies on the quality of specimens obtained by skin puncture of children: Tendency to hemolysis, and hemoglobin and tissue fluid as contaminants.
"You'll need soft-tissue mobilization to break up tissue fluids, release tension and inspire some play between the two muscles," she says.
Barbara described the effects of ultrasound as follows: a) Thermal--due to the sound waves generating heat in the tissue and b) Vibration--in which the ultrasound produces cavitation that occurs when gas-filled bubbles expand and compress because of ultrasonically induced pressure changes in tissue fluids, with a resulting increase in flow in the surrounding fluid.
This leads to decreased blood osmotic pressure, with subsequent decreased drainage of tissue fluids, which explains the edema and congestion observed in the different tissues (Ebaid et al., 2007).Collectively, imbalanced diet induced apronounced inflammation and marked hepatic and renal tissue damage.
On the other hand, the high amount of salt in water--300 g/l and in mud--95% of mineral fraction of mud relieves pelvic tissue fluids and stasis and decreases pelvic inflammation.
As the parasite circulates in the lymphatic and vascular systems, appearance of filarial organism in tissue fluids and exfoliated surface material probably occurs due to conditions causing lympho-vascular obstruction resulting in extravasations of blood and release of microfilariae.
The corrosive effect on the esophagus of a lodged button battery is caused by the generation of an external electrolytic current that hydrolyzes tissue fluids and produces hydroxide at the battery's negative pole (the anode).
It has been suggested (2) that microfilariae appear in tissue fluids and exfoliated surface material due to lymphatic or vascular obstruction.
In tissue fluids and cell culture media, the situation is radically different owing to the presence of a wide variety of natural metal complexing agents (chelators), such as amino acids, peptides, proteins, nucleotides, and glutathione, which may bind and profoundly affect the redox potential of these metals (Holmes and Williams 2000) or their dioxygen coordination capacity (Boca 1983; Van Horn et al.