Stages of Reproduction Flashcards
What is the first stage of pregnancy
Fertilisation
What happens if there is an ovum in the fallopian tubes when sperm is present
The sperm fuses with the ovum to form a zygote (Fertilisation)
What happens a few hours after fertilisation
The zygote divides into many cells until a ball of cells is formed
What happens after the zygote divides into many cells
The ball of cells attaches itself to the spongy tissue layer of the endometrium
What forms to feed the zygote in the endometrium
The Placenta
What substances move between the blood of the mother and embryo via the placenta
Nutrients
Oxygen
Waste Products
What attaches the developing embryo to the placenta
Umbilical Cord
What happens from week 8 onwards
The embryo becomes a fetus
What is the gestation period
Period from fertilisation to birth
What is the gestation period in humans normally
40 weeks
What is the role of the amniotic sac and what is it filled with
Protects the developing embryo
Filled with Amniotic fluid
