Development of a Chick Embryo

Page 50 in lab book

Safety

• Eggs may contain Salmonella bacteria. Do not consume any part of the egg.

• Wash hands thoroughly when finished.• Clean all surfaces.

http://web.uconn.edu/mcbstaff/graf/Student%20presentations/Salmonellatyphi/StyphiImage1.jpg

Study of a hen’s egg

http://lafianzoo.com/wp-content/uploads/2009/01/10.jpg

Eggs come in many different sizes

http://lujs.tripod.com/difference-in-eggs2.jpg

Cutting open your egg.

• 1. Draw an oval on the egg as shown in Figure 1.

• 2. Carefully open the egg, do not break the yolk.

http://urbanext.illinois.edu/eggs/images/eggdiagram.gif

Clean up

• 1 Throw away the bowl with the egg in it.• 2. Clean with hot soap and water all

dissection instruments then dry: Probe• scissors forcepts• 3. Wash down your lab table and dry

Part II: Chick Embryos Page 53• There are only 4

slides that are 16 hours and 24 hours. You will have to share the slides.

• Draw the image under low power in the margin of your lab book.

• Answer all questions on the page

http://images.google.com/imgres?imgurl=http://www.aps.uoguelph.ca/~swatland/chick56.jpg&imgrefurl=http://www.aps.uoguelph.ca/~swatland/ch8_2.htm&usg=__YP_prC4svWFO3e6IDS0YLeVkfhk=&h=1996&w=1204&sz=2706&hl=en&start=5&um=1&tbnid=8awhUHwtYsvPGM:&tbnh=150&tbnw=90&prev=/images%3Fq%3Dchick%2Bembryology%26as_st%3Dy%26um%3D1%26hl%3Den%26sa%3DG

33 Hour Chick Embryo: page 54• Obtain a slide of

either a 33 or 48 hour embryo.

• Draw the embryo in the margin of your lab book.

• Answer all questions on page 54-55, 5-9.

• Return Slides, put microscope away.

http://images.google.com/imgres?imgurl=http://www.aps.uoguelph.ca/~swatland/chick56.jpg&imgrefurl=http://www.aps.uoguelph.ca/~swatland/ch8_2.htm&usg=__YP_prC4svWFO3e6IDS0YLeVkfhk=&h=1996&w=1204&sz=2706&hl=en&start=5&um=1&tbnid=8awhUHwtYsvPGM:&tbnh=150&tbnw=90&prev=/images%3Fq%3Dchick%2Bembryology%26as_st%3Dy%26um%3D1%26hl%3Den%26sa%3DG

Analysis and Interpretations• 1. Digestive

– Nervous– Circulatory

2. NervousCirculatoryDigestive

3. Cellular communication is most important in development.

https://www.eevec.vet.ed.ac.uk/secure/embryology/chick60hpainted.jpg

60 hours