Stage 22 embryo also has a set of selected images showing more detail of some organ and tissue development. The Stage 13 and 22 images are available in at least two formats, an unlabeled set (image 1 - 49) and a labeled set (image 50 - 98) in a rostro-caudal sequence (head to tail).
The sections below are from the original teaching set prepared at UNSW that were digitized and put online in 1996 as a teaching resource. Even today the best way to observe anatomical development and relationships is by direct observation in serial sections through the embryo and fetus. Historically, an important way of teaching embryology is by direct observation of histological sections at different stages of development.
