Vocabulary - Development of Body Cavities

Question 1

when does embryonic folding occur?

Answer 1

between embryonic days 21-25

Question 2

parietal mesoderm is also known as…?

Answer 2

somatopleuric mesoderm

Question 3

visceral mesoderm is also known as…?

Answer 3

splanchnopleuric mesoderm

Question 4

(stomach, liver, transverse colon, sigmoid colon, small intestines)

Answer 4

intraperitoneal

Question 5

(esophagus, kidney and bladder)

Answer 5

retroperitoneal

Question 6

(ascending/descending colon, duodenum, pancreas)

Answer 6

secondary retroperitoneal

Question 7

what is just cranial to the neural plate?

Answer 7

buccopharyngeal membrane

Question 8

the horseshoe shaped area cranial AND lateral to the buccopharyngeal membrane

Answer 8

caridiogenic area

Question 9

thickened mesoderm that gives rise to portions of the liver and diaphragm

Answer 9

septum transversum

Question 10

the intraembryonic coelom is divided into which what 2 cavities?

Answer 10

pericardial and peritoneal

Question 11

How do the pericardial and peritoneal cavity “communicate”?

Answer 11

pericardioperitoneal canals

Question 12

During the fifth week, when the primitive pericardial cavity begin to partition, what stucture develop “coronal” on the lateral walls?

Answer 12

pleuropericardial folds

Question 13

During the division of the thoracic cavity, what are the 2 cavity divisions?

Answer 13

1) definitive pericardial cavity (heart)

2) a pair of pleural cavities (dorsolateral) (lungs)

Question 14

During week 5-6, the pleuroperitoneal membranes fuse with ______ to separate the pleural cavities

Answer 14

septum transversum

Question 15

diaphragm is composed of 4 embryonic structures

Answer 15

1) elements of the septum transversum
2) pleuroperitoneal membranes
3) esophageal mesoderm
4) rim of Body wall mesoderm

Question 16

3 arteries that supply the abdominal gut tube

Answer 16

1) celiac
2) superior mesenteric
3) inferior mesenteric

Question 17

Adult Derivatives of the primitive gut: pharynx, esophagus, stomach and superior 0.5 of duodenum

Answer 17

foregut

Question 18

Adult Derivatives of the primitive gut: inferior 0.5 of duodenum, jejunum, ileum, cecum, appendix, ascending colon, right 0.66 of transverse colon

Answer 18

midgut

Question 19

Adult Derivatives of the primitive gut: left 0.33 of transverse colon, descending colon, sigmoid colon, rectum

Answer 19

hindgut

Question 20

In lung development, the lung buds “bifurcate” into ____________ between days 26-28

Answer 20

primary bronchial buds

Question 21

a breathing disorder of premature newborns in which the air sacs (alveoli) in a newborn’s lungs do not remain open - beause the production of a substance that coats the alveoli (surfactant) is absent or insufficient.

Answer 21

Respiratory distress syndrome

Question 22

organ system responsible for consuming and digesting foodstuffs, absorbing nutrients, and expelling waste

Answer 22

human gastrointestinal tract (GI tract)

Question 23

when does the stomach rotate 90 degrees clockwise about a longitudinal axis?

Answer 23

~day 27 (week 7)

Question 24

when does the rotation of the stomach end?

Answer 24

~day 56

Question 25

sac created by rotation of the stomach

Answer 25

greater omentum

Question 26

what can be formed when a lobe of the pancreas migrates around the duodenum in the wrong (opposite) direction, fusing with the dorsal pancreatic bud?

Answer 26

annular pancreas

Question 27

condition caused by the persistence of vitelline duct (or yalk stalk) found at different (variable) lengths and still attached to the ileum.

Answer 27

Merkel’s diverticulum

Question 28

viscera suspended within the peritoneal cavity by a mesentary

Answer 28

intraperitoneal

Question 29

organs embedded in the body wall and covered by peritoneum

Answer 29

retroperitoneal

Question 30

fusion of mesentary and organ with body wall

Answer 30

secondary retroperitoneal

Question 31

in the development of the hindgut, when does the anterior primitive urogenital sinus gives rise to urogenital structures and posterior rectum?

Answer 31

week 4-6

Question 32

in the development of the hindgut, what structure partitions the cloaca

Answer 32

coronal urorectal septum

Question 33

at what week is the definitive gut lumen formed?

Answer 33

week 6

Question 34

when forming the definitive gut lumen, at which week is recanalization completed by?

Answer 34

week 9