MindMap Gallery Theoretical basis of embryo engineering
This is a mind map about the theoretical basis of embryo engineering. The main contents include: early embryo development and fertilization. Hope it helps everyone.
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Theoretical basis of embryo engineering
fertilization
Location: Fallopian tube
Process: preparation stage before fertilization and fertilization stage
preparation stage before fertilization
sperm capacitation
Concept: The newly discharged sperm cannot fertilize the egg immediately and must undergo corresponding physiological changes in the reproductive tract of the female animal. Only then can the ability to fertilize be obtained. This physiological phenomenon is called "sperm capacitation."
Method: Directly use the reproductive tract of female animals to capacitate sperm; culture the sperm in artificially prepared capacitation fluid to capacitate it.
sperm structure
Egg preparation
Eggs released by animals have different levels of maturity
Some may be primary oocytes, such as horses, dogs, etc.
Some may be secondary oocytes, such as pigs, sheep, etc.
It needs to mature further in the fallopian tube to reach the MⅡ stage before it has the ability to fertilize sperm.
egg structure
fertilization stage
early embryonic development
Place: Fallopian tube, uterus
Process: fertilized egg → 2-cell embryo → 4-cell embryo → 8-cell embryo → morula → blastocyst → gastrula
Cleavage stage: Division occurs within the zona pellucida, the number of cells continues to increase, and the total volume of the embryo does not increase (the volume of each cell decreases, and the total amount of organic matter decreases). This early division of the fertilized egg is called cleavage
Morula: When the daughter cells produced by cleavage gradually form a dense cell mass that looks like a morula, the embryo at this time is called a morula.
Features: Each cell has the potential to develop into a complete embryo and is a totipotent cell
blastocyst
gastrula