BIO 3147 Lecture 9: Early Mammalian Development Part 1
7 Dec 2016
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Document Summary
We similar to bird and reptiles are amniotes. Our eggs have amnion that in mammals allows us to keep the embryo wet. Reptiles and bird however are meroblastic, because they are yolk dense. Development of a human embryo from fertilization to implantation. The egg travels through the fallopian tubes terminating in the uterus where it will implant to the wall of the uterus. The egg will loose the fertilization envelope when it reaches the uterus, a type of hatching The egg will additionally begin to undergo cleavage events as it moves through the fallopian tubes. When the egg finally binds to the uterus it is a blastocyst. Cleavage of a single mouse embryo in vitro. There are some terms that are unique to mammals. At the 8 cell stage a process takes place known as compaction in which the morula changes its adhesion properties, such that the ball becomes tightly packed. Will undergo gastrulation and will become the gastrula.
