Axis

A real or imaginary straight line passing through the center of a body, such as the mandible.


Long axis of a tooth the central lengthwise line through the crown and the root.


A real or imaginary straight line around which a body may rotate.


Main line of development of a plant or organ;


(Of inflorescence) the main stem or branch part from which the flowers are produced;


(Of ovary) the central column or the central part where the inner angles of the cells meet.


The central, longitudinal support on which a plant’s parts or organs are arranged; the stem and root considered as a single unit.


The central line of any body; the organ around which others are attached (as that portion of the stem occupied by-the flowers).


The central supporting structure of a compound or divided leaf. The main stem supporting branches or individual flowers of an inflorescence.


The main stem running up through an inflorescence.


An imaginary line through the centre of the body.


A central vessel which divides into other vessels.


The second vertebra on which the atlas sits.


A real or imaginary line through the center of the body or one of its parts or a line about which the body or a part rotates.


In classifications, an axis is a conceptual framework consisting of one of the universes of objects for which categories or pigeonholes are provided. A telephone book typically has two classifications, each with a different axis: in the white pages, the single axis is the name of the subscriber; in the yellow pages, the primary axis is the type of product or service provided, the secondary axis the name of the vendor. In a classification of medicine, there are a number of universes, such as body “systems”, causes of the disorder, physiological disturbances, and anatomic sites. All parts of the body would “be found along” the anatomic axis, all causes of disease would be arranged in an etiologic axis. One classification of diseases could have a single axis, such as the diseases themselves. Another classification of diseases could have a different single axis, such as the parts of the body affected. Another might have primary and secondary (or more) axes. For example, the primary axis could be anatomical and the secondary etiologic, in which case for each body site, the causes would be categorized. The International Classification of Diseases (ICD) is described as a “variable multiaxial classification”, because in its various parts, different axes are used; for example, infectious diseases are classified according to the organism which causes them, while injuries are classified both by the site of the injury and its nature, such as fracture or laceration.


A real or imaginary line that runs through the center of a body or about which a part revolves.


A line that extends through the central axis of the body or a specific body part.


The axis is the second vertebra in the human spine and plays a crucial role in supporting the head. It is connected to the atlas, the uppermost vertebra, through a pivot joint. The atlas, in turn, attaches to the base of the skull. This pivot joint enables the head to rotate in either direction, allowing for the movement and flexibility of the neck.


A conceptual line drawn through the midpoint of a body.


 


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