Many parts of the human body are systematically arranged. The human body is studied from the erect position with the arms by the sides and the palms of the hands facing forward, he head erect and eyes looking straight in front. This is desvribed as the anatomical position.
> The median planes runs through the center of the body. Any structure which lies nearer to the median plane of the body than another is called medial to that other. For eg; the hamstring muscles which lie on the inner side of the thigh are neaer the median plane than those which lies on the outer side and are therefore medial to the group which are described as lateral.
> The term internal and external are used to describe the relative distance organ or structure from the center of a cavity.
> The term superficial and deep are used to denote relative distance from the surface of the body, and the term superior and inferior denotes positions relatively high or low, particularly in reltion to the trunk, such as the superior ad inferior surfaces of the clavicle.
> The term anterior and posterior are the synonymous with ventral and dorsal. These terms are only applied to the man in the erect attitude or 'anatomical position'.
> The term proximal or distal are employed to describe nearness to or distance from a given point, particularly in relation to the limbs.
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