human development during gestation

Question 1

blastocyst (day 7)

Answer 1

• reaches uterus

Question 2

blastocyst (day 10)

Answer 2

• implantation into endometrium

Question 3

embryo (4 weeks)

Answer 3

• brain and spinal cord
• heart
• arm and leg buds

Question 4

embryo (6 weeks)

Answer 4

• basic facial features develop

- arms and legs start to grow

Question 5

foetus (8 weeks)

Answer 5

• head nearly half foetal size
• major organs functioning
• arms bed at elbows
• eyelids have formed

Question 6

foetus (12 weeks)

Answer 6

• sexual organs obvious
• legs and arms grow
• reflexes - sucking and swallowing

Question 7

foetus (16 weeks)

Answer 7

• ossification of skeleton starts

- skin begins to form

Question 8

foetus (20 weeks)

Answer 8

• fatty tissue forms
• real hair appears on head
• body covered by lanugo and vernix
• eyebrows, eyelashes, nails formed
• foot and fingerprints formed

Question 9

foetus (24 weeks)

Answer 9

• fat stored under skin
• bone marrow makes blood cells
• possible survival out of the womb

Question 10

foetus (32 weeks)

Answer 10

• becomes plump
• testis descend
• lunago begins to fall off

Question 11

foetus (36 weeks)

Answer 11

• lungs mature
• antibodies enter from mother
• body fat increases
• less space to move

Question 12

foetus (40 weeks)

Answer 12

• normally turns into a head-down position for birth

Question 13

what is the difference between an embryo and a foetus?

Answer 13

• embryo is developing zygote

- after organs have developed after nine weeks it becomes a foetus