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1. Consisting of particles or distinct entities that can readily change their relative positions; i.e., tending to move or capable of flowing. 2. A nonsolid substance, such as a liquid or gas, that tends to flow or conform to the shape of the container. [L. fluidus, fr. fluo, to flow]
allantoic f. the f. within the allantoic cavity.
amniotic f. a liquid within the amnion that surrounds the fetus and protects it from mechanical injury.liquor amnii;
Brodie f. an aqueous salt solution used in manometers designed for testing gas evolution or uptake, as in cell respiration.
Callison's f. a diluting f. for counting red blood cells, consisting of 1 ml of Loeffler's alkaline methylene blue, 1 ml of formalin, 10 ml of glycerol, 1 g of neutral ammonium oxalate, and 2.5 g of sodium chloride added to 90 ml of distilled water, mixed well, and permitted to stand until the solids are dissolved and the reagent is clear; the preparation is filtered prior to use.
cerebrospinal f. (CSF) a fluid largely secreted by the choroid plexuses of the ventricles of the brain, filling the ventricles and the subarachnoid cavities of the brain and spinal cord.liquor cerebrospinalis [NA] ;
crevicular f. gingival f
Dakin's f. Dakin's solution
dentinal f. the lymph or f. of dentin which appears on the surface of freshly cut dentin, especially in young teeth; it is a transudate of extracellular f., mainly cytoplasm of odontoblastic processes, from the dental pulp via the dentinal tubules.dental lymph;
extracellular f. (ECF) 1. the interstitial f. and the plasma, constituting about 20% of the weight of the body; 2. sometimes used to mean all f. outside of cells, usually excluding transcellular f.
extravascular f. all f. outside the blood vessels, i.e., intracellular, interstitial, and transcellular f.'s; it constitutes about 48 to 58% of the body weight.
Farrant's mounting f. an aqueous solution containing gum arabic, arsenic trioxide, glycerol, and water, used in mounting histologic sections directly from water; some modifications involve addition of potassium acetate to bring the pH up to neutrality and substitution of other preservatives like cresol or thymol for arsenic trioxide.
gingival f. f. containing plasma proteins, which is present in increasing amounts in association with gingival inflammation.crevicular f., sulcular f;
infranatant f. clear f. that, after the settling out of an insoluble liquid or solid by the action of normal gravity or of centrifugal force, takes up the lower portion of the contents of a vessel.
interstitial f. the f. in spaces between the tissue cells, constituting about 16% of the weight of the body; closely similar in composition to lymph.tissue f;
intracellular f. (ICF) the f. within the tissue cells, constituting about 30 to 40% of the body weight.
intraocular f. aqueous humor
newtonian f. a f. in which flow and rate of shear are always proportional to the applied stress; such f. precisely obeys Poiseuille's law. Cf. non-newtonian f.
non-newtonian f. a f. in which flow and rate of shear are not always proportional to the applied stress and which does not obey Poiseuille's law. As in anomalous viscosity; Fahraeus-Lindqvist effect; Bingham plastic. Cf. newtonian f.
pleural f. the thin film of f. between the visceral and parietal pleurae.
prostatic f. succus prostaticus;a whitish secretion that is one of the constituents of the semen.
pseudoplastic f. a f. which exhibits shear thinning.
Rees-Ecker f. an aqueous solution of sodium citrate, sucrose, and brilliant cresyl blue used in platelet counts.
Scarpa's f. endolymph
seminal f. semen (1)
sulcular f. gingival f
supernatant f. clear f. that, after the settling out of an insoluble liquid or solid by the action of normal gravity or of centrifugal force, takes up the upper portion of the contents of a vessel.
synovial f. a clear thixotropic fluid, the main function of which is to serve as a lubricant in a joint, tendon sheath, or bursa; consists mainly of mucin with some albumin, fat, epithelium, and leukocytes; synovial f. also helps to nourish the avascular articular cartilage.synovia [NA], joint oil;
thixotropic f. a liquid that tends to turn into a gel when left standing, but which turns back into a liquid if agitated, as by vibrations or subjection to adequate shear.
tissue f. interstitial f
transcellular f.'s the f.'s that are not inside cells, but are separated from plasma and interstitial f. by cellular barriers; e.g., cerebrospinal f., synovial f., pleural f.
ventricular f. the portion of the cerebrospinal f. that is contained in the ventricles of the brain.
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