Embryology

Question 1

where does the appendix arise from?

Answer 1

the midgut

Question 2

Abnormal partitioning of the trachea and esophagus is the result of a defective _____________

Answer 2

tracheoesophageal septum

Question 3

Cranial, caudal and lateral folding of the intraembyonic coelom occurs in the _____ week

Answer 3

4th

Question 4

At which stage of lung maturation do Pneumocytes first appear?

Answer 4

Terminal Sac

Question 4

The Endocardial Tube folds to become the ______

Answer 4

Primitive heart tube

Question 6

Both the Foramen Ovale and Ductus Arteriosum work to bypass _____

Answer 6

Pulmonary circulation

Question 7

The hepatic portal system is bypassed by

Answer 7

Ductus venosus

Question 7

herniated bowl into the umbilical cord, or ________, results when the bowl fails to return to the abdominal cavity.

Answer 7

omphalocele

Question 8

The Vasculogenic cell clusters of the splancnic plate mesoderm form the _____ tube

Answer 8

Endocardial

Question 8

Hindgut gives rise to ________

Answer 8

Distal Colon, Cloaca

Question 8

Primary Retroparitoneal structures develop from the __________

Answer 8

Intermediate Mesoderm

Question 9

Central tendon of the diaphragm derives from the ____

Answer 9

septum transversum

Question 9

A large diaphragmatic defect accompanied by a severe diaphragmatic hernia could result from failure of the _________ membrane to close off the _______ canal

Answer 9

pleuroparitoneal, paricardioparitoneal

Question 10

All nephron components arise from growth factor communication in the _________

Answer 10

Metanephric Blastemal Cap

Question 12

Labia Minora arrise from the____

Answer 12

urogenital folds

Question 12

Homologous: Penis

Answer 12

Clitoris

Question 13

In a patient lying supine, ascites (peritoneal fluid) is most often found in the omental bursa due to gravity and fluid moving into this space through the ______

Answer 13

foramen of Winslow (epiploic/ omental foramen)

Question 14

What are the embryonic germinal components of the Bronchial lung buds

Answer 14

Endoderm and splanchnic lateral plate mesoderm

Question 15

Homologous: Labia Majora

Answer 15

Scrotum

Question 16

Bilateral renal agenesis arrises from ______ failing to form on both sides

Answer 16

mesonephric ducts

Question 17

the Pericardioperitoneal canals travel behind the _____

Answer 17

Septum transversum

Question 18

The _________ tissue is responsible for dividing the heart into four chambers and the outflow tract into pulmonary and aortic channels

Answer 18

endocardial cushion

Question 20

what supplies the ventral pancreatic bud?

Answer 20

celiac trunk

Question 21

the seminal vesicles arise from the________

Answer 21

Mesonephric duct

Question 21

Nephrogenic ridge produces the _______(x3)

Answer 21

Pronephroi, Mesonephroi, Metanephroi,

Question 23

when does the Mesonephros become active?

Answer 23

4th week

Question 24

In the Lungs, the Lining of the respiratory tract, alvioli and glands arise from the ______

Answer 24

Endoderm

Question 25

Babies born before 7 months do not produce a sufficient amount of ________, rendering them unable to breath normally.

Answer 25

surfactant

Question 26

body cavities arrise from the

Answer 26

intraembryonic coelom (3rd week)

Question 26

The metonephros form in the ______ region during the _____ week

Answer 26

pelvic, 5th

Question 27

the pronephros forms at the _______ level at the end of the ______ week

Answer 27

cervicle, 3rd

Question 29

Fusion of the right and left endocardial tubes form _____

Answer 29

the primitive heart tube

Question 30

Pleuropericardial folds grow in to compartmentalize the the primitive pericardial cavity into ____ and ____

Answer 30

Pericardial cavity and pleural cavity

Question 31

congenital diaphragmatic hernia involves

Answer 31

a hernia of the digestive organs (classically on the left side)

Question 32

lungs develope from the _______ as a respiratory diverticulum

Answer 32

Foregut

Question 33

Homologous: Labia Minora

Answer 33

Penile urethra

Question 35

urogenital folds give rise to the ______

Answer 35

Labia Minora

Question 36

The mesonephros forms from the _________ to ________ regions early in the ______ week

Answer 36

thoracic, Lumbar, 4th

Question 37

cranial folding gives rise to

Answer 37

primitive pericardial cavity and pericardialparitonial cannals

Question 39

In the Lungs, the splancnic lateral plate mesoderm gives rise to the _______

Answer 39

Pleura, Connective tissues and cartilages, blood vessels

Question 40

Pleuroperitonial folds grow in to close off the _______

Answer 40

Pericardioperitoneal canals

Question 41

Midgut gives rise to ______ and _______

Answer 41

Small intestine and Large intestine

Question 42

allows communication between abdominal and thoracic cavities

Answer 42

pericardioperitoneal canals

Question 44

septum transverum moves ____ and divides the ____ and _____

Answer 44

ventral and caudal , pericardial and peritoneal

Question 45

Resistance to blood flow into the pulmonary arteries is significantly reduced ______

Answer 45

At Birth

Question 46

some of the diaphram musculature is formed by the migrating ____________

Answer 46

paraxial mesoderm somites

Question 47

Abnormal closure of the ventral body wall, or _________, results is protruding bowl that is not covered by amnion

Answer 47

gastroschisis

Question 48

the _____________ grows in and separates the trachea and esophagus.

Answer 48

Tracheoesophageal ridge

Question 49

the formation of the diaphram involves_______ (x4)

Answer 49

bringing down the septum transversum, the migration of paraxial mesoderm somites, the esophogeal mesoderm and the body wall mesoderm.