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/kalˈke(ə)rēəs/ Adjective 1. Mostly or partly composed of calcium carbonate, in other words, containing lime or being chalky. ( 2. Chalky; relating to or containing lime or calcium, or calcific material. ( 3. (Zoology) Term applied to anatomical structures which are made primarily of calcium carbonate, in animals such as gastropods, i.e., snails, specifically about such structures as the operculum, the clausilium, and the love dart. ( Syn: Limy, chalky Word origin: From Latin calcārius (“of or pertaining to lime”), derived from calx (“lime”). Similar to...

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Calcium ATPase

1. Cation-transporting proteins that utilize the energy of ATP Hydrolysis for the transport of calcium. They differ from calcium channels which allow calcium to pass through a membrane without the use of energy. ( 2. Calcium ATPase is a form of P-ATPase that transfers calcium after a muscle has contracted. The calcium ATPase are: Plasma Membrane Calcium ATPase (PMCA) Sarcoplasmic Reticulum Calcium ATPase (SERCA)...

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Canal of Huguier

/ yū-gē-ā′/ 1. A canal in the petrotympanic or glaserian fissure, near its posterior edge, through which the chorda tympani nerve issues from the skull. ( Syn: anterior canaliculus of chorda tympani, Civinini canal, Huguier canal, iter chordae...

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Canals of Hering

1. Found between the bile canaliculi and interlobular bile ducts near the outer edge of a classic liver lobule. Histologically, the cells of the ductule are described as simple cuboidal epithelium, lined partially by cholangiocytes and hepatocytes. They may not be readily visible but can be differentially stained by cytokeratins CK19 and CK7. ( 2. A ductule occurring between a bile canaliculus and an interlobular bile duct. ( Also called intrahepatic bile...

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/ˈkarəˌpās/ Noun, pl. carapaces 1. A dorsal (upper) section of the exoskeleton or shell in a number of animal groups, including arthropods such as crustaceans and arachnids, as well as vertebrates such as turtles and tortoises. ( 2. Hard outer covering or case of certain organisms such as arthropods and turtles. ( 3. A hard protective covering of bone or chitin, especially one which covers the dorsal portion of an animal. ( Syn: shell Word origin: From French carapace (“tortoise shell”), from Portuguese carapaça (“carapace, shell”), of uncertain...

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