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Gross Anatomy > Development of Body Cavities > Flashcards

Development of Body Cavities Flashcards

1
Q

Spaces in the extraembryonic mesoderm are called what?

A

extraembryonic coelom

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2
Q

the extraembryonic coelom separates what?

A

somatic and splanchnic mesodermal layers

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3
Q

somatic mesoderm

A

lies next to SUPERFICIAL ECTODERM, lines amniotic cavity

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4
Q

splanchnic mesoderm

A

lies next to ENDODERM, associated with yolk sac

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5
Q

intermediate mesoderm forms what?

A

urogenital system

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6
Q

lateral mesoderm forms what?

A

INTRAembryonic coelom

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7
Q

formation of intraembryonic coelom does what?

A

divides lateral mesoderm into splanchnic and somatic layers

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8
Q

somatic mesoderm (II)

A

associated w/ SUPERFICIAL ECTODERM; GSA

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9
Q

splanchnic mesoderm (II)

A

associated w/ ENDODERM; GVA

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10
Q

Define somatopleure.

A

somatic mesoderm + superficial ectoderm

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11
Q

What does the somatopleure form?

A

parietal pleura, parietal pericardium, parietal peritoneum

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12
Q

define splanchnopleure.

A

endoderm + splanchnic mesoderm

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13
Q

What does the splanchnopleure form?

A

visceral pleura, visceral pericardium, visceral peritoneum

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14
Q

Intraembryonic Coelom forms what at 4 weeks?

A

body cavities

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15
Q

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

A

pericardial cavity

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16
Q

limbs of horseshoe of intraembryonic coelom gives rise to what?

A

pleural and peritoneal cavities

17
Q

Partitions in the Intraembryonic Coelom

A
  1. Septum Transversum
  2. Pleuropericardial Membranes
  3. Pleuroperitoneal Membranes
18
Q

Septum Transversum

A

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

19
Q

Where do the pericardioperitoneal canals lie?

A

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

20
Q

Pleuropericardial Membranes

A

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

21
Q

Pleuroperitoneal Membranes

A

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

22
Q

Mesentery

A

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

23
Q

Intraperitoneal Structures

A

organs suspended from the posterior body wall by mesentery

24
Q

Retroperitoneal Structures

A

covered on their anterior surfaces by a layer of parietal peritoneum

25
Q

Dorsal Mesentery

A

suspends foregut, midgut, hidngut from posterior abdominal wall

26
Q

Dorsal mesentery gives rise to:

A

gastrosplenic
gastrophrenic
gastrocolic ligaments

27
Q

Ventral mesentery

A

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

28
Q

Which 4 structures does diaphragm develop from?

A
  1. Septum Transversum
  2. Pleuroperitoneal Membranes
  3. Dorsal Mesentery of Esophagus
  4. Body Wall
29
Q

Diaphragm Devel: Septum Transversum

A

between yolk sac & pericardial cavity = CENTRAL TENDON OF DIAPHRAGM

30
Q

Diaphragm Devel: Pleuroperitoneal Membranes

A

contributes more to primitive structure

31
Q

Diaphragm Devel: DORSAL mesentery of esophagus

A

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

32
Q

Diaphragm Devel: Body Wall

A

PERIPHERAL PORTIONS of diaphragm, sensory from intercostal nerves

33
Q

Phrenic Innervation

A
  1. Mediastinal Pleura
  2. Fibrous Pericardium
  3. Diaphragmatic Pleura
  4. Parietal Peritoneum
34
Q

Pectus Excavatum

A

central tendon attached to xiphoid process

35
Q

Congenital Diaphragmatic Hernia

A

failure of fusion of pleuroperitoneal membranes with rest of diaphragm

36
Q

What is name of hole associated with CDH?

A

Foramen of Bochdalek

Gross Anatomy (9 decks)

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