(单词翻译:单击)
Cemento-enamel1 junction2- the junction between the enamel covering the crown of the tooth and the cementum covering its root. Often referred to as the CEJ.
Cementoblasts - cells of mesenchyme origin, induced by proteins from cells of ectodermal origin, to form a layer of cementum around the roots of teeth.
Cementum - a thin layer of bone-like material covering the roots of teeth and sometimes the enamel surface, containing both extrinsic3 and intrinsic fibres.
Central nervous system - the brain and spinal4 cord. The nerves which leave the spinal cord and brain comprise the peripheral5 nervous system.
Chemotaxis - the movement of cells in response to chemical messengers. The movement of neutrophils and macrophages into damaged tissues is brought about by signals released by damaged tissues, and bacterial6 products.. The term applies to the movement of any organism attracted by a specific chemical, which may be a suitable nutrient7.
Cholinergice - cell receptors specific for the neurotransmitter acetyl choline. Cholinergic receptors are found at neuromuscular junctions8 of muscle fibres and at all the synaptic junctions of the parasympathetic nervous system. They are also found at the pre- ganglionic synapse9 of the sympathetic nervous system.
Chondroitin sulphate - the major glycosaminoglycan of cartilage , the other being keratan sulphate.
Chromosomes11 - structures in the nucleus12 of a cell which appear visible during cell division. Each chromosome10 (humans have 24) is a tightly coiled string of DNA13 wound round a protein.
Clearance14 - the removal by swallowing, of substance in the mouth. Clearance is dependent on the completeness of swallowing and the rate of flow of saliva15.
Clones - a family of cells, or organisms, which are all identical to a single parent. They are produced by asexual reproduction. When a B lymphocytes has recognised a foreign antigen, it provides millions of identical daughter cells in order to produce the specific antibodies in large quantities.
Clotting - see blood clotting
1 enamel | |
n.珐琅,搪瓷,瓷釉;(牙齿的)珐琅质 | |
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2 junction | |
n.连接,接合;交叉点,接合处,枢纽站 | |
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3 extrinsic | |
adj.外部的;不紧要的 | |
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4 spinal | |
adj.针的,尖刺的,尖刺状突起的;adj.脊骨的,脊髓的 | |
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5 peripheral | |
adj.周边的,外围的 | |
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6 bacterial | |
a.细菌的 | |
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7 nutrient | |
adj.营养的,滋养的;n.营养物,营养品 | |
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8 junctions | |
联结点( junction的名词复数 ); 会合点; (公路或铁路的)交叉路口; (电缆等的)主结点 | |
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9 synapse | |
n.突触 | |
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10 chromosome | |
n.染色体 | |
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11 chromosomes | |
n.染色体( chromosome的名词复数 ) | |
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12 nucleus | |
n.核,核心,原子核 | |
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13 DNA | |
(缩)deoxyribonucleic acid 脱氧核糖核酸 | |
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14 clearance | |
n.净空;许可(证);清算;清除,清理 | |
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15 saliva | |
n.唾液,口水 | |
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