BIOL 3156 Lecture Notes - Lecture 2: Trophoblast, Blastocoel, Morula
Document Summary
Cleave at an unusually pattern one cleaves meridonally and one cleaves equatorially. Mouse embryo all the way to the trophoblast stage. Between the 8 and 16 cell stage, uvomorulin begins to get excreted and we get compaction (in. Once compaction begins, there is the morula stage. Ultimately, there is going to be fluids excreted in the spaces between the internal blastomeres so that a cavity is produced somewhat like a blastocoel cavity. First picture late blastocyst hatching process that is dependent on protease enzymes. We think that protease is secreted, which weakens the area at the wall of the zona pellucida. Last picture trophoblast that has ascended from the cell wall. It is very clear what is the trophoblast and what is the inner cell mass. Some of the trophoblast cells appear to be multiplying. It is the side closest to the inner cell mass.
