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291 ANAT > MIDDLE MEDIASTINUM > Flashcards

MIDDLE MEDIASTINUM Flashcards

1
Q

Mediastinum

A

central compartment between lungs containing all other structures of thorax

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2
Q

Mediastinum is divided into:

A

Superior and Inferior (anterior/middle/posterior)

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3
Q

Pericardium

A

CT covering of heart

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4
Q

Components of Pericardium

A
  • Fibrous pericardium
  • Serous pericardium (visceral and parietal)
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5
Q

Fibrous Pericardium

A

tough (dense) outermost layer of CT completely surrounding the heart

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6
Q

Prevents heart from expanding too much

A

Fibrous Pericardium

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7
Q

Serous Pericardium

A

layer of serosa lining

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8
Q

Visceral layer of serous pericardium

A

inner layer (at root of heart), intimately associated with heart tissue, covers heart

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9
Q

Parietal layer of serous pericardium

A

outer layer, lines fibrous pericardium, intimately associated with visceral

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10
Q

Pericardial Cavity

A

space between the visceral and parietal layers of serous pericardium

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11
Q

Pericardial Cavity contains…

A

pericardial fluid and 2 sinuses (oblique and transverse)

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12
Q

allows for friction-free movement of heart

A

Pericardial Fluid

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13
Q

Oblique Sinus

A

portion of pericardial cavity behind the heart (posterior portion pericardial sac)

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14
Q

Transverse Sinus

A

portion of pericardial cavity behind (posterior to) aorta and pulmonary artery

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15
Q

Arterial supply of pericardium

A

Fibrous/Parietal (branches from Internal Thoracic and Aorta) & Visceral Layer (off of coronary arteries)

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16
Q

Venous drainage of pericardium

A

Internal Thoracic, azygos system

17
Q

Sensory innervation of pericardium

A

Fibrous/Parietal (phrenic nerve) & Visceral (sympathetic)

18
Q

L and R Phrenic Nerves are normally attached to

A

lateral aspect of L and R sides of pericardium

19
Q

L and R Phrenic Nerves supply..

A

L and R “halves of diaphragm (L and R hemidiaphragms)

20
Q

diaphragm divided in half at mid-point where…

A

esophagus, aorta, and IVC pass through

21
Q

Somatic innervation =

A

Fibrous/Parietal

22
Q

Autonomic innervation =

A

Visceral

291 ANAT (8 decks)

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