anatomical axis
proximal-distal axis
proximodistal
spatial
BSPO:0000015
In some communities, proximal and distal are used when specifying the position of parts of elements that are contained within the body, such as gill arches or vertebral spines. In these cases, use of the classes medial-lateral axis or medial-external axis are more appropriate.
An axis that extends from the point of attachment of a structure (proximal) to the point furthest away from the plane of attachment (distal).
proximal/distal