HFF Embryology

Question 1

________ is the big event of week 3 and begins with formation of the _______ _______.

Answer 1

Gastrulation

begins with formation of the primitive streak

Question 2

What germ layer does the notochord form from?

Answer 2

Mesoderm

Question 3

What do the cloacal and oropharyngeal membranes go on to form, respectively?

Answer 3

Cloacal –> anus

Oropharyngeal membrane –> oral cavity

Question 4

Formation of the intraembryonic coelom splits the _______ mesoderm into the _______ and _______ mesoderm.

Answer 4

the IEC splits the lateral mesoderm into the somatic (dorsal side) and splanchnic (ventral side) mesoderm

Question 5

Somites form from the ________ mesoderm and go on to form the….(3)?

Answer 5

Somites form from the paraxial mesoderm and go on to form the vertebrae, ribs, muscles.

Question 6

What does the intermediate mesoderm go on to form?

Answer 6

Kidneys, gonads

Kidneys Intermediate gonaDS

Question 7

Describe the fate of the lateral mesoderm.

Answer 7

Splits to somatic and splanchnic mesoderm. Splanchnic forms the visceral pleura and somatic forms the parietal pleura.

Question 8

In general, what does the ectoderm go on to form?

Answer 8

Skin, nervous system

Question 9

In general, what does the mesoderm go on to form?

Answer 9

The “means” - muscles, heart, skeleton