B1.3.4 - Development of a fetus Flashcards Preview

SHHS - Science - B1.3 - Reproduction (Year 7) > B1.3.4 - Development of a fetus > Flashcards

Flashcards in B1.3.4 - Development of a fetus Deck (23)
Loading flashcards...
1
Q

Describe what happens during birth.

A
  1. The mothers cervix relaxes.
  2. The muscles in the wall of the uterus contract.
  3. This pushes the baby out through the vagina.
2
Q

What is the scientific name for an egg that has been fertilised?

A

A zygote

3
Q

What is the function of the umbilical cord?

A

It connects the fetus to the placenta.

4
Q

What happens in the 9th week of pregnancy?

A

Fetus can move

Lips and cheeks sense touch

Eyes and ears are forming.

5
Q

In mammals, the time spent in the uterus during development is called…

A

gestation

6
Q

What effect can smoking have on an unborn baby?

A

Premature birth

Low birth weight

7
Q

What is the function of the fluid sac (amniotic sac)?

A

It acts as a shock absorber, protecting the fetus from any bumps.

8
Q

Identify the missing labels:

A
9
Q

What happens in the 1st week of pregnancy?

A

Cells of the embryo begin to specialise (do specific jobs)

10
Q

Identify the missing labels:

A
11
Q

What is the function of a placenta?

A
  1. An organ where substance pass between the mother’s blood and the fetus’s blood.
  2. It acts as a barrier, which stops infections and harmful substances reaching the fetus.
12
Q

What happens in the 4th week of pregnancy?

A

Spine and brian are forming and heart is beating.

13
Q

Identify the missing labels:

A
14
Q

What effect can alcohol have on an unborn baby?

A

Poor brain development

15
Q

What happens in the 12th week of pregnancy?

A

Fetus can kick, suck, swallow and practise breathing.

16
Q

Identify the missing labels:

A
17
Q

Identify the missing labels:

A
18
Q

After 8 weeks of growth an embryo is called a…

A

fetus

19
Q

How long is the human gestation period?

A

9 months (40 weeks)

20
Q

Does the blood of mother and fetus mix when it is developing in the uterus?

A

NO - but useful substances like nutrients and oxygen can pass from mother to baby through the placenta.

21
Q

When a fertilised egg (zygote) divides into a ball of cells, we call the ball of cells an…

A

embryo

22
Q

Identify the missing labels:

A
23
Q

What 3 things do midwives advise pregnant woman to do?

A
  1. Eat a healthy diet
  2. Do not smoke
  3. Do not drink alcohol