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Cardiopulmonology > (3) Formation Of The Body Cavity (Keim) > Flashcards

(3) Formation Of The Body Cavity (Keim) Flashcards

1
Q

What weeks are embryonic development occuring?

A

3-8

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2
Q

What events are occuring during embryonic development?

A

Growth

Morphogenesis

Differentiation

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3
Q

When does folding of the embryo occur?

A

Week 4

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4
Q

Within what plane do the head and tail folding occur?

A

Median plane

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5
Q

Describe when and where the heart can initially be seen:

A

Heart can be seen in front of the oropharyngeal membrane

in the EARLY 4th week

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6
Q

What is the septum transversum going to become?

A

The diaphragm

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7
Q

Describe the folding relationship between the developing heart and the septum transversum

A

The septum transversum flips under the heart

This causes final location UNDER THE HEART

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8
Q

The foregut gives rise to:

A

Some GI Structures

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9
Q

The _______ overgrows the heart and septum transversum

A

Forebrain

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10
Q

The ______ overgrows the cloaca and connecting stalk

A

Forebrain

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11
Q

During week 4, describe a major communication event:

A

Intraembryonic coelom is communicating with the extraembryonic coelom

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12
Q

HORIZONTAL FOLDING

Where would the somatic and splanchnic layers of lateral plate mesoderm be located in the inital stage of horizontal folding?

A
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13
Q

HORIZONTAL FOLDING

Where is the intraembryonic coelom?

A
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14
Q

HORIZONTAL FOLDING

What is the end result?

A

Formation of the Intraembryonic Coelom

(Midgut)

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15
Q

HORIZONTAL FOLDING

Technically, what is the intraembryonic coelom?

A

Space b/w the splanchnic and somatic portions of lateral plate mesoderm

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16
Q

HORIZONTAL FOLDING

What does the intraembryonic coelom communicate with?

A

Extraembryonic coelom

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17
Q

What is the splanchnopleura?

A

Splanchnic layer of the lateral plate mesoderm and the endoderm making up the yolk sack adjacent

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18
Q

What is the somatopleura?

A

Made up of somatic lateral plate mesoderm and ectoderm surrounding the amniotic cavity

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19
Q

Where is the splanchnic portion of the lateral plate mesoderm?

A

Adjacent to the yolk sac

20
Q

Where does pinching off and formation of body cavities occur?

A

Where the umbillical cord IS NOT!!!

The sides come down and pinch off, forming the structures seen in the image

21
Q

Label the diagram

A
22
Q

Label the diagram

A
23
Q

What is ectopia cordis?

A

Heart forms outside the body

24
Q

What are the results of ectopia cordis?

A
  • Heart formed outside body
  • No pericardium
  • Will be a bifed sternum
  • Can result in death
25
Q

Clinically, how can ectopia cordis be identified?

A

Ultrasound

26
Q

The somatic layer of the lateral plate mesoderm is going to give rise to ___________________

A

The parietal part of any organ

27
Q

The splanchnic layer gives rise to the _________ layer

A

Visceral

28
Q

The pericardial cavity houses the:

A

Heart

29
Q

The peritoneal cavity comprises:

A

The abdomen

30
Q

Pericardial Cavity Formation

Describe

A

Lateral folds produce the heart!

Combination of endocardial primordia that initially has 2 segments, then merges cogether amongst the pericardial coelom

31
Q

What is the

Somatic Layer?

Splanchnic Layer?

A

Somatic Layer = Parietal Pericardium

Splanchnic Layer = Visceral Pericardium

32
Q

What innervates the diaphragm?

What nerve roots does it come from?

A

Phrenic nerves

C3, C4, C5

33
Q

The pericardial cavity is separated from the pleural canals by _______________

A

Pleuropericardial Folds (Membrane)

34
Q

The pleuropericardial folds come from ________ layer of the _______

A

SOMATIC; LATERAL PLATE MESODERM

35
Q

Describe the development of lungs:

A

When the bronchial buds enter the pericardial peritoneal canals, they are immersed in the splanchnic layer lateral plate mesoderm.

Once those pleuralpericardial folds have separated everything, the pleural cavity for the lungs and mediastinum is formed.

36
Q

Label the diagram

A
37
Q

Look where the mouse cursor is:

What is this derived from?

A

Parietal pericardium is made from the somatic layer of lateral place mesoderm

38
Q

What is the fibrous layer of the parietal pericardium made of?

A

Somatic layer of the lungs

39
Q

Describe the formation of the diaphragm

A

The septum transversum requires pleuralperitoneal folds to meet the posterior body

40
Q

Closure of the Pericardioperitoneal Canal

A

The pericardioperitoneal canal is closed by the approximation of the pleuroperitoneal folds with the septum transversum

41
Q

The septum transversum gives rise to:

A

Central tendon

42
Q

What are pleuroperitoneal membranes?

A

Overgrown by the muscle walls, don’t give rise to adult structures

43
Q

Dorsal mesentary of the esophagus gies rise to:

A

The crura

44
Q

The body wall give rise to:

A

Peripheral muscles

45
Q
A

Cardiopulmonology (22 decks)

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