Chapter 21Generalembryology
Chapter 21 General embryology
Gametogenesis2Fertilizationto Implantation3BilaminarGerm DiscTrilaminarGermDisc4DifferentiationofGermLayers?6EstablishmentofBodyForm7.FetalMembranesandPlacenta8.Twins
1. Gametogenesis 2. Fertilization to Implantation 3. Bilaminar Germ Disc 4. Trilaminar Germ Disc 5. Differentiation of Germ Layers 6. Establishment of Body Form 7. Fetal Membranes and Placenta 8. Twins
1.GametogenesisA process offormationand maturation of thegametes (sperm and ovum)1.1Thepurposeof gametogenesisReductionof the numberof chromosomes.>Alteration of the shape of germ cells forfertilization
A process of formation and maturation of the gametes (sperm and ovum) 1.1 The purpose of gametogenesis Reduction of the number of chromosomes. Alteration of the shape of germ cells for fertilization. 1. Gametogenesis
1.2ProcessOogenesisSpermatogenesisOogoniumSpermatogoniummitosisfetal periodmitosispubertyPrimary spermatocytePrimaryoocytemeiosis 1pubertymeiosis1Secondaryoocyte-Secondaryspermatocytefertilizationmeiosis2meiosis2(22+X)K22+Y)QQQMatureovumPolarbodiesSpermatids(22 + X)(22 + X)
1.2 Process Spermatogenesis Oogenesis
Spermatogenesisa.ProcesspubertySpermatogoniumSpermatocyteSpermatids→Sperms-2n:46,xy2n:46,xyn:23 x;23n:23 x;23 ymitosismeiosisb. Functional mature:Get the ability of the movementc. Capacitating: Obtaining capacity of the fertilization
Spermatogenesis a. Process Spermatogonium Spermatocyte Spermatids Sperms mitosis meiosis 2n:46,xy 2n:46,xy n:23 x;23 y n:23 x;23 y b. Functional mature: Get the ability of the movement c. Capacitating: Obtaining capacity of the fertilization puberty