![]() ![]() Author Comments Start here by looking through the early (week 4) embryo (stage 13) labeled images. 2011 - Selected slides are currently being rescanned at to show specific developmental details. In addition, there are now 3D animations based upon reconstruction of the embryos from these serial sections. Stage 22 embryo also has a set of selected images showing more detail of some organ and tissue development. Photograph 01 of 15: 24 Hour Chick Section 2 of 240 through anterior tip of head fold. 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).ΔΆ4-hour Chick Embryo. 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. ![]() Introduction Historically, an important way of teaching embryology is by direct observation of histological sections at different stages of development. ![]()
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