Development of Body Cavities

Question 1

Spaces in the extraembryonic mesoderm are called what?

Answer 1

extraembryonic coelom

Question 2

the extraembryonic coelom separates what?

Answer 2

somatic and splanchnic mesodermal layers

Question 3

somatic mesoderm

Answer 3

lies next to SUPERFICIAL ECTODERM, lines amniotic cavity

Question 4

splanchnic mesoderm

Answer 4

lies next to ENDODERM, associated with yolk sac

Question 5

intermediate mesoderm forms what?

Answer 5

urogenital system

Question 6

lateral mesoderm forms what?

Answer 6

INTRAembryonic coelom

Question 7

formation of intraembryonic coelom does what?

Answer 7

divides lateral mesoderm into splanchnic and somatic layers

Question 8

somatic mesoderm (II)

Answer 8

associated w/ SUPERFICIAL ECTODERM; GSA

Question 9

splanchnic mesoderm (II)

Answer 9

associated w/ ENDODERM; GVA

Question 10

Define somatopleure.

Answer 10

somatic mesoderm + superficial ectoderm

Question 11

What does the somatopleure form?

Answer 11

parietal pleura, parietal pericardium, parietal peritoneum

Question 12

define splanchnopleure.

Answer 12

endoderm + splanchnic mesoderm

Question 13

What does the splanchnopleure form?

Answer 13

visceral pleura, visceral pericardium, visceral peritoneum

Question 14

Intraembryonic Coelom forms what at 4 weeks?

Answer 14

body cavities

Question 15

Anterior, rostral curve of intraembyronic coelom gives rise to what?

Answer 15

pericardial cavity

Question 16

limbs of horseshoe of intraembryonic coelom gives rise to what?

Answer 16

pleural and peritoneal cavities

Question 17

Partitions in the Intraembryonic Coelom

Answer 17

1. Septum Transversum
2. Pleuropericardial Membranes
3. Pleuroperitoneal Membranes

Question 18

Septum Transversum

Answer 18

mesoderm’
primordium of central tendon of diaphragm
located between heart and peritoneal cavity/stalk of yolk sac

Question 19

Where do the pericardioperitoneal canals lie?

Answer 19

dorsal to septum transversum and lateral on either side of developing foregut

Question 20

Pleuropericardial Membranes

Answer 20

paired membranes that separate pericardial and pleural cavities; superior to diaphragm

Question 21

Pleuroperitoneal Membranes

Answer 21

paired membranes that separate peritoneal and pleural cavities; inferior to diaphragm

Question 22

Mesentery

Answer 22

double fold of peritoneum that is suspending entire gut from dorsal abdominal wall
neither parietal nor visceral

Question 23

Intraperitoneal Structures

Answer 23

organs suspended from the posterior body wall by mesentery

Question 24

Retroperitoneal Structures

Answer 24

covered on their anterior surfaces by a layer of parietal peritoneum

Question 25

Dorsal Mesentery

Answer 25

suspends foregut, midgut, hidngut from posterior abdominal wall

Question 26

Dorsal mesentery gives rise to:

Answer 26

gastrosplenic gastrophrenic gastrocolic ligaments

Question 27

Ventral mesentery

Answer 27

disappears except where its attached to the caudal part of foregut; peritoneal cavity becomes larger continuous space

Question 28

Which 4 structures does diaphragm develop from?

Answer 28

1. Septum Transversum 2. Pleuroperitoneal Membranes 3. Dorsal Mesentery of Esophagus 4. Body Wall

Question 29

Diaphragm Devel: Septum Transversum

Answer 29

between yolk sac & pericardial cavity = CENTRAL TENDON OF DIAPHRAGM

Question 30

Diaphragm Devel: Pleuroperitoneal Membranes

Answer 30

contributes more to primitive structure

Question 31

Diaphragm Devel: DORSAL mesentery of esophagus

Answer 31

crura of diaphragm= 2 muscular slips coming down from posterior aspect of the diaphragm on either side of vertebral column

Question 32

Diaphragm Devel: Body Wall

Answer 32

PERIPHERAL PORTIONS of diaphragm, sensory from intercostal nerves

Question 33

Phrenic Innervation

Answer 33

1. Mediastinal Pleura 2. Fibrous Pericardium 3. Diaphragmatic Pleura 4. Parietal Peritoneum

Question 34

Pectus Excavatum

Answer 34

central tendon attached to xiphoid process

Question 35

Congenital Diaphragmatic Hernia

Answer 35

failure of fusion of pleuroperitoneal membranes with rest of diaphragm

Question 36

What is name of hole associated with CDH?

Answer 36

Foramen of Bochdalek