Pregnancy 1
Name of the structure connecting the to fetus and mother
Umbilical cord
How long is the human gestation period
9 months
(38-40 weeks)
How does the embryo forms
The zygote will divide several times to form a ball of cells
Name of the tube connecting the ovaries and uterus
Oviduct
Name of membrane surrounding fetus
Amniotic sac
Define implantation
When the embryo embeds itself in the thick lining of the uterus
Name of the liquid inside the amniotic sac made from mothers plasma
Amniotic fluid
Have long does it take for the zygote to travel to the uterus
3 days
How many blood vessels connect the fetus and placenta
3
The placenta acts as a barrier. What does it stop from passing through?
Toxin molecules or pathogenic organisms
Purpose of amniotic sac
To protect the fetus during its development from bumps to the mothers abdomen
Connection the umbilical cord makes
Umbilical cord joins the fetus’ blood supply to the mother's placenta
Name nutrients the fetus needs to grow and where it gains it from
The fetus develops and grows by gaining glucose, amino acids, fats, water and oxygen from the mother's blood
Why are pregnant women discouraged from smoking
Because molecules like nicotine can pass across the placenta
Describe stage 1 of the labor process
Cervix dilation - Uterus contracts, and the cervix gradually widens (dilates) to allow the baby to pass through.