downward transition
111human 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… …
112tunnels and underground excavations — ▪ engineering Introduction Great tunnels of the world Great tunnels of the worldhorizontal underground passageway produced by excavation or occasionally by nature s action in dissolving a soluble rock, such as limestone. A vertical opening …
113Market trend — Statues of the two symbolic beasts of finance, the bear and the bull, in front of the Frankfurt Stock Exchange. A market trend is a putative tendency of a financial market to move in a particular direction over time.[1] These trends are… …
114Classical period (music) — Periods of Western art music Early Medieval   (500–1400) Renaissance (1400–1600) Baroque (1600–1760) Common practice Baroque (1600–1760) …
115Emergence — For other uses see Emergence (disambiguation), Emergent, and Emergency. : See also the closely related articles: Spontaneous order and self organization. In philosophy, systems theory and the sciences, emergence is the way complex systems and… …
116Action potential — In physiology, an action potential is a short lasting event in which the electrical membrane potential of a cell rapidly rises and falls, following a consistent trajectory. Action potentials occur in several types of animal cells, called… …
117Economy of the Soviet Union — The economy of the Soviet Union was based on a system of state ownership, administrative planning, socialist competition and free labour. The Soviet Union created the modern world s first centrally planned economy. The first major project of… …
118Atmospheric models — Static atmospheric models describe how the ideal gas properties (namely: pressure, temperature, density, and molecular weight) of an atmosphere change, primarily as a function of altitude. For example, the US Standard Atmosphere is essentially a… …
119Sediment Profile Imagery — (SPI) is an underwater technique for photographing the interface between the seabed and the overlying water. The technique is used to measure or estimate biological, chemical, and physical processes occurring in the first few centimetres of… …
120Fisheries glossary — This is a glossary of terms used in fisheries, fisheries management and fisheries science. A * Abundance is a measure of how many fish are in a population or a fishing ground. See relative abundance and absolute abundance.* Acoustic survey a… …
