Reproduction 0.0 / 5 ? BiologyReproductionGCSECCEA Created by: mmcmillen810Created on: 15-06-18 19:59 Ovulation RELEASE of OVUM from ovary - occurs every 28 DAYS (mid-cycle) 1 of 6 Fertilisation When HAPLOID sperm NUCLEUS joins with HAPLOID ovum NUCLEUS. In OVIDUCT as ovum travels to UTERUS. 2 of 6 Zygote The FERTILISED CELL formed. It is DIPLOID and DIVIDES by MITOSIS to form ball of cells 3 of 6 Implantation When BALL OF CELLS attaches to WALL OF UTERUS. Cells now called EMBRYO. After this the EMBRYO differentiates - produces different tissue + organs. 4 of 6 The Amnion SAC filled with AMNIOTIC FLUID cushioning the FOETUS from bumps as it DEVELOPS. 5 of 6 The Placenta EXCHANGE SURFACE for gases and nutrients. Highly FOLDED to increase SURFACE AREA for DIFFUSION. 6 of 6
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