Embryology

Question 1

What term is given to the developing baby from when fertilisation occurs to the end of week 3?

Answer 1

Conceptus

Question 2

What term is given to the developing baby from week 4 to week 8?

Answer 2

Embryo

Question 3

What term is given to the developing baby from week 9 to birth?

Answer 3

Foetus

Question 4

What are the 6 phases of embryonic development?

Answer 4

Gametogenesis
Fertilisation
Cleavage
Gastrulation
Morphogenesis
Organogenesis

Question 5

What occurs in gametogenesis?

Answer 5

Formation of germ cells (sperm, ovum)

Question 6

What occurs in fertilisation?

Answer 6

Formation of zygote

Question 7

What happens in cleavage?

Answer 7

Rapid cell division

Question 8

What happens in gastrulation?

Answer 8

Formation of germ layers (ectoderm, mesoderm, endoderm)

Question 9

What happens in morphogenesis?

Answer 9

Folding of embryo forms 3D human-like shape

Question 10

What will the ectoderm go on to produce?

Answer 10

Skin

Nervous system

Question 11

What will the mesoderm go on to produce?

Answer 11

Organs

Question 12

What will the endoderm go on to produce?

Answer 12

Lining of gut

Lung bud

Question 13

What is the zona pellucida?

Answer 13

Tough protein coat surrounding oocyte to give it protection

Question 14

In cleavage, zygote divides into morula and then further into blastomeres. How many celled blastomeres are totipotent (can give rise to any cell/structure)?

Answer 14

8-cell blastomeres are totipotent

Question 15

What is the amazing thing about development, according to Veronica Van Heyningen?

Answer 15

The amazing thing about development is not that it sometimes goes wrong, but that it ever succeeds.

Question 16

What are the 4 components of Tetralogy of Fallot?

Answer 16

Pulmonary stenosis
Right ventricular hypertrophy
Overriding aorta
Ventricular septal defect