Thoracic Cavity Development Flashcards Preview

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Flashcards in Thoracic Cavity Development Deck (23):
1

Pleural Cavities

Space in which lungs develop and persist

2

Pericardial Cavity

Space in which heart develops and persists

3

Peritoneal Cavity

Space in which abdominal viscera develops and persists
Herniation of small intestine and portion of large intestine

4

Septum Transversum

Will become the central tendon of the thoracic diaphragm

5

Intraembryonic Ceolum

Primordium of embryonic cavities
Develops during 4th week

6

Cranial End of Intraembryonic Ceolum

Future pericardial cavity
Embryo undergoes head fold to get pericardium and heart ventrocaudally to get position anterior to foregut

7

Caudal Limbs - Intraembryonic Ceolum

Future pleural and peritoneal cavities
Opens to extraembryonic ceolum

8

Mesenteries

Double layer of peritoneum that extends from abdominal wall

9

Dorsal Mesentery

Permanent Structure - conveys blood vessels, nerves, and lymphatics to organs

10

Ventral Mesentery

Remains attached to caudal part of foregut (liver)

11

Parietal Peritoneum

covers body wall

12

Visceral Peritoneum

covers organ

13

Pericardioperitoneal Canal Location

Lateral to foregut (esophagus)
Dorsal to septum transversum (diaphragm(

14

Cranial Ridges

Pleuropericardial Folds
Superior to developing lungs
Separate pleural from pericardial cavities

15

Caudal Ridges

Pleuroperitoneal folds
Inferior to developing lungs
separate pleural from peritoneal cavities

16

Pleuropericardial Membranes

Enlargement of pleurppericardial folds
Separate pleural from pericardial cavities
Contain cardinal veins

17

Primordial Mediastinum

Formed by 7th week - pleuropericardial membranes have fused with ventral mesenchyme

18

Primordial Mediastinum contains

All organs except pleura and lung

19

Pleuroperitoneal Membranes

Enlargement of pleuroperitoneal fold
Separates pleural from peritoneal cavities
During 6th week - membrane fuses with dorsal mesentery to make the separation

20

Diaphragm develops from

Septum Transversum
Pleuroperitoneal Membranes
Dorsal Mesentery of esophagus
Muscular ingrowth from lateral body walls

21

Diaphragm Innervation

Myoblast migrate into pleuroperitoneal membranes from 3-5 cervical myotomes carrying their nerves with them
Nerves pierce the membranes and are located on the fibrous pericardium
C3,4,5 keeps the diaphragm alive

22

Posterolateral Defect

Left membrane not fusing and the intestine goes in

23

Congenital Hiatal Hernia

Stomach going up and bulges itno chest through the opening