FERTILIZATION & EARLY DEVELOPMENT LAB
Exercise 60
complete pages 487-493
This lab is to allow you to become familiar with the series of changes that occur after fertilization of the oocyte. Look at and label with sticky paper the full size models.
|
secondary oocyte |
sperm |
Morula |
cleavage |
yolk sac |
|
zona pellucida |
head |
Blastocyst |
placenta maternal side and fetal side |
amnion |
|
corpus radiata |
midpiece |
inner cell mass |
umbilical artery & vein |
chorionic villi |
|
polar body |
tail |
trophoblast |
embryonic disc |
This material will appear on your practical so you will want to view all models and know the location of all of the listed structures
There are schematics of developmental histology in Exercise 60 and you can use the histology cards and atlas in the front of the room. We will not be looking at slides. Instead you will draw images from the histology cards and models. I want you to draw and label each of the following.
IN THIS ORDER
|
secondary oocyte o zona pellucida o corona radiate
(instead of single urchin egg) |
sperm o head o midpiece o tail (instead of fertilized egg) |
|
2 cell cleavage |
4 cell cleavage
|
|
Morula
(instead of 8-cell sea urchin) |
blastocyst o inner cell mass o trophoblast (instead of 16 cell sea urchin) |