Pregnancy and the Roles of the Placenta and the Amniotic Flyid

Question 1

What is a zygote called when it divides

Answer 1

An embryo

Question 2

When does an embryo start to be called a foetus

Answer 2

When cells start to become specialised with arms and legs visible

Question 3

Function of the amniotic sac

Answer 3

Protection from microbes

Question 4

Function of amniotic fluid

Answer 4

Protection from bumps and knocks

Question 5

Function of the umbilical cord

Answer 5

Carries oxygen, food and waste between mother and baby

Question 6

Function of the placenta

Answer 6

Takes oxygen and food from mothers blood and puts waste into mothers blood

Question 7

Does the mothers and baby’s blood mix at the placenta

Answer 7

No they have separate blood circulatory systems

The placenta is like a barrier

Question 8

Substances that can pass across placenta from the foetus to the mother

Answer 8

Carbon dioxide and other waste/ urea

Question 9

Useful substances that can pass across the placenta from the mother to the foetus

Answer 9

Oxygen
Digested food/ glucose
Antibodies

Question 10

Harmful substances that can pass across the placenta from the mother to the foetus

Answer 10

Drugs
Alcohol
Microbes- HIV, rubella