Pregnancy Development Flashcards
Zygote undergoes series of subdivisions which reduce the amount of cytoplasm in the cells
Blastomeres
Blastomeres subdivide for about 3 days to form these solid ball of cells
Morula
The morula reaches the uterus about day 4 and during the next 2 days it develops into this hollow ball of cells
Blastocyst
The inner cell lay becomes detached from the outer cell layer and the separation yields this fluid filled cavity
Amniotic cavity
By the 12th day a third cell layer develops and the blastocyst become this structure
Gastrula
During gastric stood 3 germ layers form to give rise to the various organ systems:
Ectoderm
Mesoderm
Endoderm
The 3 germ layers form a sheet of cells called
Embryonic Disk
When the secondary oocyte is fertilized it becomes a single cell
Zygote