Reproduction Process
Define menstruation and explain the stages of the menstrual cycle
Menstruation and the menstrual cycle
http://www.youtube.com/watch?v=WGJsrGmWeKE
Task 6
Fill in the missing words in the statements below.
Stage 1
DAYS 1 TO 4
Bleeding starts as the lining of the X breaks down and passes out of the X.
This is known as X
Stage 2
DAYS 5 – 13
An X starts to mature and the lining of the X starts to build up again.
Stage 3
Around Day 12-14
An egg (ovum) is released from an X. This process is called X.
Stage 4
DAYS 15 – 28
The X wall stays thick waiting for a fertilised X.
If the egg is fertilised it will eventually X itself in the uterus wall.
If this does not happen, the cycle starts all over again.
Identify the stages of pregnancy
Early pregnancy – first week
Menstruation and the menstrual cycle
http://www.youtube.com/watch?v=WGJsrGmWeKE
Task 6
Fill in the missing words in the statements below.
Stage 1
DAYS 1 TO 4
Bleeding starts as the lining of the X breaks down and passes out of the X.
This is known as X
Stage 2
DAYS 5 – 13
An X starts to mature and the lining of the X starts to build up again.
Stage 3
Around Day 12-14
An egg (ovum) is released from an X. This process is called X.
Stage 4
DAYS 15 – 28
The X wall stays thick waiting for a fertilised X.
If the egg is fertilised it will eventually X itself in the uterus wall.
If this does not happen, the cycle starts all over again.
Identify the stages of pregnancy
Early pregnancy – first week
Task 7
Define the following terms:
Ovulation X
Fertilisation X
Implantation X
What method of cell division is used for the new life to develop? X
Explain why the embryo undergoes implantation.
X
Do SciPad Pg 192
Task 8
Download and read the pdf on the stages of pregnancy from the WGHS Junior Science site. Answer the following questions.
How long does pregnancy usually last? X
Explain the difference between a zygote, an embryo and a foetus
X
Do SciPad Pg 193
Explain how the new life is sustained during pregnancy
During pregnancy, the developing foetus is sustained by a placenta which exchanges substances between mother's blood and foetus' blood without the bloods mixing.
Both oxygen & food and transferred from the mother to foetus, providing the foetus with enough nutrients to survive. Carbon dioxide (CO2) & wastes are transferred from the foetus to mother. This is because the foetus cannot get rid of these wastes on its own, so it passes them on to the mother who gets rid of them.
Parts of a developing foetus include the amniotic fluid which controls temperature and helps with shock absorption, the umbilical cord which connects the foetus to the placenta.
The placenta is a ‘pancake’ shaped structure that is full of blood vessels. This system is called the ‘life support system’ as it acts like a life support machine in hospitals which contain cords that pass nutrients to the patient and help get rid of their wastes. During pregnancy, the umbilical cord and placenta pass nutrients, and wastes between the mother and the baby, keeping it alive and healthy so it can grow into a baby.
During pregnancy, if the mother takes drugs and alcohol, the foetus is at risk of developing foetal alcohol syndrome. This is because when drugs and alcohol are taken, they enter the blood stream, which can become an issue considering blood is how the foetus gets its food and nutrients. The harmful substances in the drugs and alcohol can be passed from the mother to the foetus via the umbilical cord.
Define the following terms:
Ovulation X
Fertilisation X
Implantation X
What method of cell division is used for the new life to develop? X
Explain why the embryo undergoes implantation.
X
Do SciPad Pg 192
Task 8
Download and read the pdf on the stages of pregnancy from the WGHS Junior Science site. Answer the following questions.
How long does pregnancy usually last? X
Explain the difference between a zygote, an embryo and a foetus
X
Do SciPad Pg 193
Explain how the new life is sustained during pregnancy
During pregnancy, the developing foetus is sustained by a placenta which exchanges substances between mother's blood and foetus' blood without the bloods mixing.
Both oxygen & food and transferred from the mother to foetus, providing the foetus with enough nutrients to survive. Carbon dioxide (CO2) & wastes are transferred from the foetus to mother. This is because the foetus cannot get rid of these wastes on its own, so it passes them on to the mother who gets rid of them.
Parts of a developing foetus include the amniotic fluid which controls temperature and helps with shock absorption, the umbilical cord which connects the foetus to the placenta.
The placenta is a ‘pancake’ shaped structure that is full of blood vessels. This system is called the ‘life support system’ as it acts like a life support machine in hospitals which contain cords that pass nutrients to the patient and help get rid of their wastes. During pregnancy, the umbilical cord and placenta pass nutrients, and wastes between the mother and the baby, keeping it alive and healthy so it can grow into a baby.
During pregnancy, if the mother takes drugs and alcohol, the foetus is at risk of developing foetal alcohol syndrome. This is because when drugs and alcohol are taken, they enter the blood stream, which can become an issue considering blood is how the foetus gets its food and nutrients. The harmful substances in the drugs and alcohol can be passed from the mother to the foetus via the umbilical cord.
Task 9
Describe the structure and function of the following structures:
Placenta X
Umbilical cord X
Amniotic sac X
What substance is not exchanged? X
What is the role of the Umbilical Cord? X
What substances pass from the mother to the foetus? X
What substances pass from the foetus to the mother? X
What mechanism does the placenta use to exchange gases? X
Why is the baby in a sac of fluid? X
Explain what is meant by the term ‘life support system. In your answer, discuss why you think the placenta and umbilical cord act like a life
support machine for a baby during pregnancy.
X
Describe the main events during birth
Three stages of labour/birth
http://www.youtube.com/watch?v=BgZ5z6RB06c
Task 10
Describe the 3 stages of labour (birth).
Stage 1
X
Stage 2
X
Stage 3
X
Describe the structure and function of the following structures:
Placenta X
Umbilical cord X
Amniotic sac X
What substance is not exchanged? X
What is the role of the Umbilical Cord? X
What substances pass from the mother to the foetus? X
What substances pass from the foetus to the mother? X
What mechanism does the placenta use to exchange gases? X
Why is the baby in a sac of fluid? X
Explain what is meant by the term ‘life support system. In your answer, discuss why you think the placenta and umbilical cord act like a life
support machine for a baby during pregnancy.
X
Describe the main events during birth
Three stages of labour/birth
http://www.youtube.com/watch?v=BgZ5z6RB06c
Task 10
Describe the 3 stages of labour (birth).
Stage 1
X
Stage 2
X
Stage 3
X