descending sets
11digestive system, human — Introduction the system used in the human body for the process of digestion. The human digestive system consists primarily of the digestive tract (alimentary canal), or the series of structures and organs through which food and liquids pass… …
12Disasters — ▪ 2009 Introduction Aviation January 23, Poland. A Spanish built CASA transport plane carrying members of the Polish air force home from a conference on flight safety in Warsaw crashes near the town of Miroslawiec; all 20 aboard are killed …
13ear, human — ▪ anatomy Introduction organ of hearing and equilibrium that detects and analyzes noises by transduction (or the conversion of sound waves into electrochemical impulses) and maintains the sense of balance (equilibrium). The human ear, like …
14human cardiovascular system — ▪ anatomy Introduction organ system that conveys blood through vessels to and from all parts of the body, carrying nutrients and oxygen to tissues and removing carbon dioxide and other wastes. It is a closed tubular system in which the… …
15Robertson–Seymour theorem — In graph theory, the Robertson–Seymour theorem (also called the graph minor theorem[1]) states that the undirected graphs, partially ordered by the graph minor relationship, form a well quasi ordering.[2] Equivalently, every family of graphs that …
16Marcel Duchamp — Duchamp redirects here. For other uses, see Duchamp (disambiguation). Marcel Duchamp Marcel Duchamp playing chess in 1952. (Kay Bell Reynal photo in the Smithsonian Institution Archives of American Art.) Birth name …
17Well-founded relation — In mathematics, a binary relation, R, is well founded (or wellfounded) on a class X if and only if every non empty subset of X has a minimal element with respect to R; that is, for every non empty subset S of X, there is an element m of S such… …
18Mount Everest — Everest redirects here. For other uses, see Everest (disambiguation). Mount Everest (Qomolongma / Sagarmatha) Highest Mountain in the World …
19Interval cycle — In music, an interval cycle is a collection of pitch classes created from a sequence of the same interval class.[1] In other words a collection of pitches by starting with a certain note and going up by a certain interval until the original note… …
20Temple architecture (LDS Church) — On December 27, 1832 two years after the organization of Latter Day Saint church the movement s founder, Joseph Smith, Jr., reported receiving a revelation that called upon church members to restore the practice of temple worship. The Latter Day… …
