Chapter 21 General Embryology
Chapter 21 General Embryology
a science which study the processes and regulations of development of human fetus.(from 1 cell(zygote)to (5-7)X1012 cells total 38 weeks preembryonic period: before 2 weeks
---a science which study the processes and regulations of development of human fetus.(from 1 cell(zygote) to (5-7)X1012 cells ) ---total 38 weeks: preembryonic period: before 2 weeks
embryonic period 3-8 weeks 3周 4周 5周 6周 7周 8周 fetal period: after 9 weeks perinatal stage: 26 weeks to birth 9周16周 36)(38周 Teratology: abnormal development of fetus
embryonic period: 3-8 weeks fetal period: after 9 weeks *perinatal stage: 26 weeks to birth *Teratology: abnormal development of fetus
fErtilization definition the process by Which the male and female gametes(sperm and ovum) unite to give rise to zygote ---place: in the ampullary region of the fallopian tube
1.Fertilization ---definition: the process by which the male and female gametes(sperm and ovum) unite to give rise to zygote ---place: in the ampullary region of the fallopian tube
精原细胞 娴细所 初级精母 细形6,XY)○ 初级卵母细胞 次级精 时细肥 精子 细胞 次级卵母 极体 23.x23,Y23,x123Y 细23 精子 极体 卵f conditions 1) maturation of oocyte 2) maturation of spermatozoon /ductus epididymus: 2-3 weeks, forward motility protein
---conditions: 1) maturation of oocyte 2) maturation of spermatozoon: /ductus epididymus: 2-3 weeks, forward motility protein