Blood pressure is the force per unit area exerted by the blood against a vessel wall and is expressed in millimeters of mercury (mm Hg). Resistance is a measure of the friction between blood and the vessel wall, and arises from three sources: blood viscosity, blood vessel length, and blood vessel diameter.apillaries are the smallest vessels and allow for exchange of substances between the blood and interstitial fluid. Continuous capillaries are most common and allow passage of fluids and small solutes. Fenestrated capillaries are more permeable to fluids and solutes than continuous capillaries.
A House Divided Against Itself Cannot Stand Abraham Lincoln June 1858. Lincoln delivered this famous speech, noted for the phrase a house divided against itself cannot stand, when accepting the Republican nomination for U.S. Senate from Illinois in June of 1858.
Sharon Fenick first heard the figure of speech rule of thumb cited as a sexist pejorative during her freshman year at Harvard seven years ago. The phrase was invoked in a lecture as an example of domestic abuse permitted by British common law.