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HUMAN REPRODUCTION
Human chromosomes: caryo;pe
A chromosome: DNA (genes) and proteins
The male reproduc;ve system
Male rep system: a front view
The female reproduc;ve system
The female R. S: a front view
Gametogenesis
Gametogenesis
Gametogenesis: growth, meiosis, matura;on
The sperm cell: a very specialized cell
1. membrane 2 , 3, 4: acosome 5: nucleus 6 and 7 : centrioles 8 9 , 10 11 12:
fibers 9: mitochondrion A: head B and C : midpiece D and E: tail, flagellum
The ovum or egg cell
A human egg cell
Ovum and sperm cells
The ovarian cycle
1 to 6: Follicular phase, it lasts 14 days, s;mulated by FSH
6: ovula;on, s;mulated by LH; body temperature increases 8 to 9 : Lutela phase, progesterone increases. It ends with pregnancy or
menstrua;on.
The menstrual cycle
The menstrual cycle
The menstrual cycle
Fer;lisa;on: the acrosome recognizes the human female membrane and breaks it down
Fer;lisa;on: just male nucleus goes into the ovum, a barrier forms around the ovum
A fer;lized egg: 2 nuclei are joined together: a zygote is formed
Cleavage: first week of gesta;on: morula is produced by mitosis, cells divide and blastula, gastrula
and embryo develops
Fer;lisa;on to implanta;on
FIV techniques
Vitro fer;liza;on
Stages to an embryo
Foetus, placenta end pregnancy
Labour and birth: dilata;on of cervix, foetal expulsion and delivery of the placenta
What can you recognize?: