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.
A shim is a thin and often tapered or wedged piece of material, used to fill small gaps or spaces between objects. Shims are typically used in order to support, adjust for better fit, or provide a level surface.Shims may also be used as spacers to fill gaps between parts subject to wear.igh quality shim stock can be bought commercially, for example as laminated shims, but shims are often created ad hoc from whatever material is immediately available. Laminated shim stock is stacked foil that can be peeled off one layer at a time to adjust the thickness of the shim.