48 Hour Chick Embryo Serial Cross Section
CONTENTS | Development of the ChickLike fish eggs, chick eggs are telolecithal and undergo meroblastic cleavage.Chick development has traditionally been presented in embryology and developmentalbiology courses because of the accessibility of embryos at desired stages. As well, it is a good model for understanding vertebrate development ingeneral and mammalian development in particular. Remember, you are not justlooking at the embryos; you are studying them to understand how the embryois formed. 24-hour ChickYou should studythe embryo by examining the material prepared by Dr. Steven Scaddingat The University of Guelph at his Web site, Developmental Biology ONLINE. This link will take you to the introduction homepage of the 24-hour chickembryo. It is crucial that you read and understand the explanationgiven on how to navigate through the 15 photographs of the chick embryo. After you have carefully read this, click on the 'GO! To the site'button. Movie: Ch_24hr.Mov. Next, you should use this movieto obtain an overview of the 24-hour chick embryo and to obtain a senseof the structural continuity of the embryo. This film was compiled fromphotographing serial cross-sections of the embryo. 48-hour ChickUse the same procedure as for the 24-hour stage. A detailedanalysis of the 48-hour chick has been prepared by Dr. Scadding. Again,the homepage for the 48-hour chick must be thoroughly understood beforeproceeding. Hint: The cranial flexure of the embryo makes the head of thechick point caudally, so that the most anterior section is the midbrain. The dextral torsion refers to the twisting of the embryo whereby the leftside of the anterior half rests upon the yolk, and the posterior half remainsdorsal-ventral with respect to the yolk. There are 45 sections to view. You will not have enough time to analyzethem in depth and identify every structure. Be sure that you can identifythe following:
Movie: Ch_48hr2.Mov. Now examine the movie of the48-hour chick embryo cross-sections and try to identify the above structuresin the various sections. |
Dynamic Developmentat a Glance |
Chick Embryo
Dynamic Development is a Virtual Embryo learning resource.
Another Way To Look at Serially Sectioned. Serially Sectioned Chick Embryo Movies 24 hr 33 hr 33 hr 48. Serial sections are where we slice an embryo as if it. Chick 12 to 16 hours-wm. Chick 28 hours-wm. Chick 33 hours-wm. Chick 48 hours-wm. Chick 72 hours-wm. FROG (7 mm), typical sagittal section (not serial) with representative regions. PIG (15 MM), spaced serial cross section. 48 hour chick serial sections. Lab practical. Thin layer of tissue surrounding the embryo. Is a fluid filled sac that is also known as the 'bag of waters' in humans. The fluid in the amniotic cavity provides a buffer that protects the embryo from high forces. Derived from somatopleure. Deep layer of the amnion is ectoderm, while.
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| This material may be reproduced for educational purposes only providedcredit is given to the original source. Leon Browder& Laurie Iten(Ed.) Dynamic Development Last revised Wednesday, July 29, 1998 |