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Acanthodii

Acanthodii  

Class of primitive, fossil fish that had a true bony skeleton, a heterocercal tail fin, a persistent notochord, ganoid scales, and stout spines in front of the fins. The acanthodians lived from the ...
acid–base homeostasis

acid–base homeostasis  

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All living things depend on water. Life consists of a highly complex series of chemical reactions occurring in aqueous media. Among the most important factors in the composition of these ...
Actinopterygii

Actinopterygii  

; class Osteichthyes)A subclass of ray-finned fish, that includes the majority of living bony fish of sea and fresh water. The fins are composed of a membranous web of skin supported by a varying ...
alignment

alignment  

The location of the tooth relative to the supporting alveolar bone and adjacent and opposing teeth.
alveolar crest

alveolar crest  

The most coronal part of the alveolar bone. In the healthy periodontium, the distance between the alveolar crest and the cement–enamel junction is 1–2mm, as measured on a radiograph.
analgesia

analgesia  

(an-ăl-jeez-iă)reduced sensibility to pain, without loss of consciousness and without the sense of touch necessarily being affected.
Andreas Vesalius

Andreas Vesalius  

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(1514–64)Belgian physician and anatomist, who was a professor at Padua for six years before becoming a physician to the Habsburg court. He is remembered for producing in 1538–43 definitive text and ...
blood

blood  

(blud)a fluid that circulates throughout the body, via the arteries and veins, providing a vehicle by which an immense variety of different substances are transported between the various organs and ...
bone sounding

bone sounding  

The process of probing anaesthetized tissue with a periodontal probe to establish the level of the underlying alveolar bone.
calcium

calcium  

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(kal-siŭm)a metallic element that is an important constituent of bones, teeth, and blood. It is also essential for many metabolic processes, including nerve function, muscle contraction, and blood ...
cancellous

cancellous  

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adj. lattice-like: applied to the porous spongy network of flattened sheets of bone, interconnected like a honeycomb, that forms the interior of bones and has a lower density than the surrounding ...
caries

caries  

n. decay and crumbling of the substance of a tooth (see dental caries) or a bone. —carious adj.
cartilage

cartilage  

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A skeletal connective tissue formed by groups of cells that secrete into the intercellular space a ground substance containing a protein, collagen (q.v.), and a polysaccharide, chondroitin sulfuric ...
cartilage bone

cartilage bone  

Bone that is formed by replacing the cartilage of an embryo skeleton. The process, called endochondral ossification, is brought about by the cells (osteoblasts) that secrete bone. Compare membrane ...
cartilaginous fish

cartilaginous fish  

Fish in which the skeleton, including the skull and jaws, consists entirely of cartilage and never, even in the adult stage, comprises bony tissue. Sharks and rays (Chondrichthyes) have a ...
cementum

cementum  

(si-men-tŭm)a thin layer of hard tissue on the surface of the root of a tooth. It anchors the fibres of the periodontal membrane to the tooth.
chondroitin

chondroitin  

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A polysaccharide of galactosamine and glucuronic acid, a mucopolysaccharide. Chondroitin sulphate is a component of cartilage and the organic matrix of bone, and has been used in treatment of ...
chondroitin sulphate

chondroitin sulphate  

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A mucopolysaccharide that forms an important constituent of cartilage, bone, and other connective tissues. It is composed of glucuronic acid and N-acetyl-D-galactosamine units.
cod liver oil

cod liver oil  

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(kod)a pale yellow oil, extracted from the livers of cod and related fish, that is rich in vitamins A and D and used in the treatment and prevention of deficiencies of these vitamins (e.g. rickets).
collagen

collagen  

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n. a protein that is the principal constituent of white fibrous connective tissue (as occurs in tendons). Collagen is also found in skin, bone, cartilage, and ligaments. It is relatively inelastic ...

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