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This position provides a definition of what is at the front ("anterior"), behind ("posterior") and so on. As part of defining and describing terms, the body is described through the use of anatomical planes and anatomical axes. The meaning of terms that are used can change depending on whether an organism is bipedal or quadrupedal.
dilation, distal, dilute, different, dissection: dia-through, during, across Greek διά (diá), through, during, across dialysis: digit-of or pertaining to the finger [rare as a root] Latin digitus, finger, toe digit: diplo-twofold Greek διπλόος (diplóos) diploid, diplosis -dipsia (condition of) thirst Greek δίψα (dípsa)
By using precise anatomical terms, such as "proximal," "distal," "palmar," or "dorsal," this ambiguity is eliminated, ensuring clear communication. To standardize this system of terminology, Terminologia Anatomica was established as an international reference for anatomical terms.
This molar is both posterior, as well as distal, to the premolars in front of it. Most of the principal terms can be combined using their corresponding combining forms (such as mesio-for mesial and disto-for distal). They provide names for directions (vectors) and axes; for example, the coronoapical axis is the long axis of a tooth.
The distal part of the palmar ligament, called the palmar plate, is 2 to 3 millimetres (0.079 to 0.118 in) thick and has a fibrocartilaginous structure. The presence of chondroitin and keratan sulfate in the dorsal and palmar plates is important in resisting compression forces against the condyles of the proximal phalanx.
[5] [6] A more technical definition is from the proximal segment to the point where the LAD forms an angle, as seen from a right anterior oblique view on angiography, which is often close to the origin of the second diagonal branch. [7] Distal: from middle segment to apex, [5] [6] or in some cases beyond. [7]
Definition Etymologic memory aid; apophysis: Any of various processes or protuberances on a bone. apo-+ physis, "outward from the growth part; outgrowth" diaphysis: The long, relatively straight main body of a long bone; region of primary ossification. Also known as the shaft. dia-+ physis, "between the growth parts" epiphysis
Anatomy figure: 20:04-01 at Human Anatomy Online, SUNY Downstate Medical Center – "Posterior view of the heart." [dead link ] Anatomy photo:20:09-0104 at the SUNY Downstate Medical Center [dead link ] – "Heart: The Left Coronary Artery and its Branches" Image at merck.com Archived 14 April 2006 at the Wayback Machine