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.
For the sculptor, see Vadim Sidur. A siddur (Hebrew: ×¡×××¨ â [siËduÊ] ; plural ×¡×××¨××, [siduËÊim]) is a Jewish prayer book, containing a set order of daily prayers. The word siddur comes from the Hebrew root Hebrew: ×¡××´×¨ â meaning order.wo authoritative versions of the Ashkenazi siddur were those of Shabbetai Sofer in the 16th century and Seligman Baer in the 19th century; siddurim have also been published reflecting the views of Jacob Emden and the Vilna Gaon.