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Anatomy Written 3 > Thoracic Cavity Development > Flashcards

Thoracic Cavity Development Flashcards

1
Q

Pleural Cavities

A

Space in which lungs develop and persist

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2
Q

Pericardial Cavity

A

Space in which heart develops and persists

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3
Q

Peritoneal Cavity

A

Space in which abdominal viscera develops and persists

Herniation of small intestine and portion of large intestine

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4
Q

Septum Transversum

A

Will become the central tendon of the thoracic diaphragm

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5
Q

Intraembryonic Ceolum

A

Primordium of embryonic cavities

Develops during 4th week

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6
Q

Cranial End of Intraembryonic Ceolum

A

Future pericardial cavity

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

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7
Q

Caudal Limbs - Intraembryonic Ceolum

A

Future pleural and peritoneal cavities

Opens to extraembryonic ceolum

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8
Q

Mesenteries

A

Double layer of peritoneum that extends from abdominal wall

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9
Q

Dorsal Mesentery

A

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

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10
Q

Ventral Mesentery

A

Remains attached to caudal part of foregut (liver)

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11
Q

Parietal Peritoneum

A

covers body wall

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12
Q

Visceral Peritoneum

A

covers organ

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13
Q

Pericardioperitoneal Canal Location

A

Lateral to foregut (esophagus)

Dorsal to septum transversum (diaphragm(

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14
Q

Cranial Ridges

A

Pleuropericardial Folds
Superior to developing lungs
Separate pleural from pericardial cavities

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15
Q

Caudal Ridges

A

Pleuroperitoneal folds
Inferior to developing lungs
separate pleural from peritoneal cavities

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16
Q

Pleuropericardial Membranes

A

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

17
Q

Primordial Mediastinum

A

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

18
Q

Primordial Mediastinum contains

A

All organs except pleura and lung

19
Q

Pleuroperitoneal Membranes

A

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

20
Q

Diaphragm develops from

A

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

21
Q

Diaphragm Innervation

A

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
Q

Posterolateral Defect

A

Left membrane not fusing and the intestine goes in

23
Q

Congenital Hiatal Hernia

A

Stomach going up and bulges itno chest through the opening

Anatomy Written 3 (9 decks)

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