Zusammenfassung der Ressource
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Structure of pericardium
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Functions of pericardium
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Facilitation of secure intrathoracic cardiac stability
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Friction reduction between heart & the mediastinum structures
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Nutrition of the heart
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Limitation of cardiac distention and chamber dilation
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Uniform cardiac distribution of pericardial cavity hydrostatic pressure
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Formation of a barrier to stop infection
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Facilitation of atrial filling by promoting negative pericardial pressure during ventricular systole
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(pericardium + pleural fluid): formation of a system that automatically applies compensating hydrostatic pressures to the cardiac periphery when accelerating forces act
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The thickness of the pericardium is [blank_start]1-2 mm[blank_end].
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Fibrous pericardium
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made up from tough connective tissue
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thick
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thin
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stong
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fragile
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composed mainly of three collagen layers, cross-woven at 150° to each other
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Pericardial relationships
Anteriorly: [blank_start]lungs[blank_end] + [blank_start]pleura coverings[blank_end]
Laterally: [blank_start]pleural coverings[blank_end] of the mediastinal surfaces of the lungs
Superiorly: [blank_start]diaphragm[blank_end]
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lungs
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pleura coverings
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pleural coverings
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diaphragm
Frage 6
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Visceral layer of serous pericardium = [blank_start]epicardium[blank_end]
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The heart is located in the .... mediastinum.
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posterior
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anterior
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middle
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superior
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Fill in the gaps of the surfaces and of the margin/borders.
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right pulmonary surface
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left pulmonary surface
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diaphragmatic surface
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sternocostal surface
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base
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apex
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acute margin
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obtuse margin
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An average adult heart is [blank_start]12[blank_end] cm from base to apex, [blank_start]8–9[blank_end] cm at its broadest transverse diameter and [blank_start]6[blank_end] cm anteroposteriorly. Its weight varies from [blank_start]280 to 340 g (average 300 g)[blank_end] in males and from [blank_start]230 to 280 g (average 250 g)[blank_end] in females
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14
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12
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10
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6
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9-12
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6-8
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8-9
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7-9
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4
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6
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8
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7-10
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280 to 340 g (average 300 g)
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230 to 280 g (average 250 g)
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200 to 240 g (average 220 g)
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230 to 280 g (average 220 g)
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280 to 340 g (average 300 g)
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180 to 240 g (average 200 g)
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230 to 280 g (average 250 g)
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Adult weight is achieved between the ages of [blank_start]17[blank_end] and [blank_start]20[blank_end] years. The heart reaches 50% of its adult dimensions [blank_start]at birth[blank_end], 75% by [blank_start]5[blank_end] years and 90% by [blank_start]12[blank_end] years
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-The extensive [blank_start]interatrial groove (of Waterston)[blank_end] separates the two atria.
-The [blank_start]atrio- ventricular (coronary) groove[blank_end] separates the atria from the ventricles and contains the main trunks of the coronary arteries.
-Internally, the ventricles are separated by the septum; its mural margins correspond to the ante- rior and inferior (diaphragmatic) [blank_start]interventricular grooves[blank_end].
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The apex of the heart is located most commonly behind the [blank_start]fifth left[blank_end] intercostal space, near or a little medial to the [blank_start]midclavicular line[blank_end].
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fifth left
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midclavicular line
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The diaphragmatic surface of the heart rests mainly on the [blank_start]central tendon[blank_end] but also, apically, on a small area of the left muscular part of the diaphragm.