Embryology

Question 1

What is the cloacal membrane?

Answer 1

Caudal area where endoderm is in direct contact with ectoderm - will form the anus

Question 2

What is the allantois?

Answer 2

Extension of the primitive gut or yolk sac into the umbilical cord

Question 3

What is the buccopharyngeal membrane?

Answer 3

Cranial area where endoderm is in direct contact with the ectoderm - will form the mouth

Question 4

What are the cytotrophoblasts?

Answer 4

The inner cell layer of the trophoblast

Question 5

What is the diencephalon?

Answer 5

Part of the forebrain that will become the optic cup and stalk, pituitary gland, thalamus, hypothalamus and pineal body

Question 6

What does the greater omentum develop from?

Answer 6

Dorsal mesentery

Question 7

What is the gubernaculum?

Answer 7

Part of the peritoneum attached to the gonad

Question 8

What is the mesencephalon?

Answer 8

Part of the neural tube that will become the midbrain

Question 9

What is the metencephalon?

Answer 9

Part of the hindbrain that will become the pons and cerebellum

Question 10

What is the nephrogenic cord?

Answer 10

Part of the urogenital ridge contains cell that are the source of most of the urinary system

Question 11

What is the neural plate?

Answer 11

A thick flat bundle of ectoderm directly overlying the notochord that develops in the embryo into the neural tube and subsequently the nervous system

Question 12

What is the notochord?

Answer 12

A rod of cells constituting the foundation of the axial skeleton around which the segments of the vertebral column are formed

Question 13

What is the primitive streak?

Answer 13

A structure involved in initiating gastrulation runs as a depression on the epiblastic surface of the bilaminar disc, is restricted to the caudal half of the embryo

Question 14

What is the pronephros?

Answer 14

The first transient kidney structure to form, redundant in humans

Question 15

What is the prosencephalon?

Answer 15

Part of the neural tube that will become the forebrain

Question 16

What is the rhomboncephalon?

Answer 16

Part of the neural tube that will become the hind brain

Question 17

What is the septum transversum?

Answer 17

A sheet of mesodermal cells located between the pericardial cavity and the yolk sac stalk that forma major part of the diaphragm
Also involved in dividing the thoracic and abdominal cavities

Question 18

What is the sinus venosus?

Answer 18

Forms the inflow to the heart tube from the convergence of the major embryonic veins

Question 19

What is the synctiotrophoblast?

Answer 19

The outer layer of the trophoblast

Question 20

What is the telencephalon?

Answer 20

Part of the forebrain that will become the cerebral hemispheres

Question 21

What is Tetralogy of Fallot?

Answer 21

Pulmonary stenosis, overriding aorta connecting both ventricles, a VSD and RV hypertrophy

Question 22

What is the truncus arteriosus?

Answer 22

The cranial part of the primitive heart tube that becomes the ascending aorta and pulmonary trunk

Question 23

Where does the ureteric bud from?

Answer 23

from caudal end of mesonephric duct