Structures that Form in Pregnancy and Functions

Question 1

Amniotic fluid

Answer 1

Supports and protects from shocks and physical damage

Question 2

Amnion

Answer 2

Thin, tough membrane

Protects developing foetus

Question 3

Umbilical cord

Answer 3

Supplies nutrients and oxygen from the mother’s blood, to foetus blood via the umbilical cord
Removes carbon dioxide and other waste products

Question 4

Placenta

Answer 4

Organ responsible providing oxygen and nutrients + removing waste substances
Grows into the wall of uterus , joined to foetus by umbilical cord
Carbon dioxide and waste substances diffuse across placenta from foetus to mother

Question 5

Substances that pass from foetus to placenta

Answer 5

Carbon dioxide
Water
Waste products

Question 6

Substances that pass across placenta from mother to foetus

Answer 6

Useful= oxygen, digested food/glucose, antibodies, water, vitamins, nutrients
Harmful= drugs, alcohol and HIV and rubella ,

Question 7

Avoid

Answer 7

Alcohol
Drugs
Nicotine

Question 8

What is the placenta

Answer 8

Barrier can prevent some harmful bacteria in mother from reaching baby
Contains villi to increase surface area for exchange of nutrients /waste

Question 9

Mother and foetus each have…. (something to do with blood)

Answer 9

Separate circulations

Blood doesn’t mix