Human development from fertilisation to birth

Question 1

Fertilisation

Answer 1

-if a sperm enters an ovum in the Fallopian tubes, fertilisation occurs.
-a haploid sperm meets a haploid egg to create a diploid zygote.

Question 2

Conception

Answer 2

-once an egg has been fertilised it closes off for other sperm
-the fertilised egg travels down the Fallopian tubes and into the uterus

Question 3

Blastocyst

Answer 3

-as the egg is travelling, it is undergoing mitosis creating a hollow ball of cells called a blastocyst.

Question 4

Implantation

Answer 4

-blastocyst (now an embryo) is embedded into the endometrium (uterine wall) where it will get its nutrients until the placenta forms.

Question 5

Fetus

Answer 5

-fetus receives nutrients from placenta as it grows approximately 9 months

Question 6

Birth

Answer 6

-oxytocin is released causing contractions to begin
-causes water to break
-cervix needs to dilate about 10cm to begin active labour
-baby would exit head first + face down
-complications with the dilation will cause c-section to be done or surgically cutting open the vagina