In certain organisms, these smaller substances are absorbed through the small intestine into the blood stream. Digestion is a form of catabolism that is often divided into two processes based on how food is broken down: mechanical and chemical digestion. The term mechanical digestion refers to the physical breakdown of large pieces of food into smaller pieces which can subsequently be accessed by digestive enzymes.
shibboleth (plural shibboleths) 1  A word, especially seen as a test, to distinguish someone as belonging to a particular nation, class, profession etc. 2  A common or longstanding belief, custom, or catchphrase associated with a particular group, especially one with little current meaning or truth. It's about time we abandoned the bourgeois shibboleth that earning money makes you a better person.
Babbitt, also called Babbitt metal or bearing metal, is any of several alloys used for the bearing surface in a plain bearing.The original Babbitt metal was invented in 1839 by Isaac Babbitt in Taunton, Massachusetts, USA.He disclosed one of his alloy recipes but kept others as trade secrets.n the traditional style of a babbitt metal bearing, a cast iron pillow block is assembled as a loose fit around the shaft, with the shaft in approximately its final position. The inner face of the cast iron pillow block is often drilled to form a key to locate the bearing metal as it is cast into place.