Foetal Development

Question 1

4 weeks

Answer 1

• 4mm long, blocks of mesodermal tissue that will become muscles and vertebrae of spine.
• 3 clefts of throat become face, throat, and associated glands.

Question 2

5 weeks

Answer 2

• Arm and leg buds appear.

Question 3

End of 8th week

Answer 3

• Embryo has recognisable human form and is called a foetus. All organs present.

Question 4

Foetal Period

Answer 4

• Increases in size
• Maturation of the organ systems
• Head grows proportionally smaller whilst limbs grow longer.
• Fingernails, toenails, and hair appear.
• Significant changes in mother.

Question 5

3 months

Answer 5

• Forelimbs well developed.
• Eyelids closed.
• Outer ear completed.
• Bone marrow formed.
• Blood cells in bone marrow.
• Sex distinguishable.

Question 6

4 months

Answer 6

• Arms and hands fully shaped
• Skeleton completed
• Exercising of muscles evident.

Question 7

5 months

Answer 7

• Fine hair covers body
• Gripping reflexes developed.
• Increased growth.

Question 8

6 months

Answer 8

• Respiratory movements
• Digestive glands begin functioning.
• Tooth buds evident.
• Eyebrows and eyelashes.

Question 9

7 months

Answer 9

• Period of greatest growth.

- All system function except respiratory.

Question 10

8 months

Answer 10

• Accumulation of fat beneath skin.

- Growth slowed.

Question 11

9 months

Answer 11

• Eyes open
• Nose well-formed
• Sucking and grasping reflexes.
• Fine body hair is shed.