1.Previous
3.Next

stage. Distinct ends of the embryo are chosen, and the axis is named according to those directions. The three main axes of a bilaterally symmetrical animal that intersect at right angles, are the left-right, the craniocaudal, and the anteroposterior axes.
* The left-right axis, also known as the horizontal or frontal axis
* The craniocaudal axis, also known as the rostrocaudal, longitudinal or cephalocaudal
* The anteroposterior axis, also known as the dorsoventral, or sagittal axis

An

1.Previous
3.Next