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central nervous system
(Encyclopedia)central nervous system: see nervous system. ...transdermal delivery system
(Encyclopedia)transdermal delivery system: see skin patch. ...heart, in anatomy
(Encyclopedia) CE5 Cross section of heart, with arrows indicating direction of blood flow heart, muscular organ that pumps blood to all parts of the body. The rhythmic beating of the heart is a ceaseless activit...blood
(Encyclopedia)blood, fluid pumped by the heart that circulates throughout the body via the arteries, veins, and capillaries (see circulatory system; heart). An adult male of average size normally has about 6 quarts...numeration
(Encyclopedia)numeration, in mathematics, process of designating numbers according to any particular system; the number designations are in turn called numerals. In any place value system of numeration, a base numb...squid
(Encyclopedia)squid, carnivorous marine cephalopod mollusk. The squid is one of the most highly developed invertebrates, well adapted to its active, predatory life. The characteristic molluscan shell is reduced to ...numeral
(Encyclopedia)numeral, symbol denoting anumber. The symbol is a member of a family of marks, such as letters, figures, or words, which alone or in a group represent the members of a numeration system. The earliest ...Chordata
(Encyclopedia) CE5 Common features in representative groups of the phylum Chordata Chordata kôrdāˈtə, –däˈ– [key], phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal ...Maryland, University System of
(Encyclopedia)Maryland, University System of, state-supported system of higher education in Maryland, est. 1988 as the University of Maryland System, renamed 1997. It includes all but two of the publicly supported ...navigation satellite
(Encyclopedia)navigation satellite, artificial satellite designed expressly to aid the navigation of sea and air traffic. Early navigation satellites, from the Transit series launched in 1960 to the U.S. navy's Nav...Browse by Subject
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