This section describes the general terms used to orient different parts of the crab. The major axes run from front-to-back, top-to-bottom, and from center-to-exterior.
Illustration of the anterior-posterior axis of the crab. Figure modified from Crane (1975).Illustration of the dorsal-ventral axis of the crab. Figure modified from Crane (1975).Illustration of the proximal-distal axes of the crab. Figure modified from Crane (1975).