Non-cardiac embryology Flashcards Preview

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Flashcards in Non-cardiac embryology Deck (25):
1

Where is the intraembryonic coelom located? What are its three cavities

1. Located between the parietal and viseral layers of lateral plate mesoderm

2. Pericardial cavity at cranial end, Pleural cavity at arm, and Peritoneal cavity at caudal end

A image thumb
2

What does lateral folding do?

Brings lateral extensions (arms) of intraembryonic coelom together ventrally

Forms pleural cavity and peritoneal cavity

3

What does longitudinal folding do?

1. Pericardial cavity forms: moves ventrally and caudally

2. Septum transversum forms: moves caudal to pericardial  cavity

4

After folding what is anterior and posterior to the foregut?

anterior: pericardial cavity

posterior: septum transversum and peritoneal cavity

5

Which membrane separates the pericardial cavity from the peritoneal cavity?

Septum transversum

6

What is the pericardioperitoneal canal?

Small tube connecting pericardial cavity and peritoneal cavity

7

What membrane separates the lungs and heart?

pleuropericardial membrane

8

What separates the two lungs?

Esophagus mesentery

9

What is congenital disphragmatic hernia (CDH)?

Failure of the pericardioperitoneal canals to close (intestines move out of diaphragm)

10

Pleuropericardial membrane

1. Derived from what layer

2. What does it contain?

1. Parietal layer of lateral plate mesoderm

2. contain common veins and phrenic nerves

11

Pleuroperitoneal membrane

1. What does it fuse with?

1. Septum transversum and dorsal mesentery of the esophagus

12

What does the gut tube form from?

Endoderm

13

What forms the trachea?

Respiratory diverticulum (bud out from foregut)

14

What separates the respiratory diverticulum from the foregut?

Tracheoesophageal ridge

15

What is tracheoesophageal fistula?

Incomplete ridge -> trachea and esophagus are connected

16

What forms the fibrous pericardium and phrenic nerves?

Pleuropericardial membranes (from parietal layer)

17

What does the pericardioperitoneal canals become?

Pleural cavities

18

What does the septum transversum become?

central tendon of diaphragm

19

What does the dorsal mesentery of the esophagus become?

Crura (underside) of the diaphragm

20

What does the body wall become?

Muscles at lateral edges of diaphragm

21

What do the cervical somites (C3-5) become?

diaphragm muscles

22

What does the respiratory diverticulum become?

Trachea and bronchi

23

Name all the things that the visceral layer of lateral plate mesoderm becomes

1, Lung smooth muscle

2. Alveolar capillaries

3. Tracheal rings (cartilage)

4. Serous pericardium = visceral pleura

24

What does the parietal layer become?

Parietal pleura

25

What does the serous pericardium come from?

visceral layer