Facilitation of secure intrathoracic cardiac stability
Friction reduction between heart & the mediastinum structures
Nutrition of the heart
Limitation of cardiac distention and chamber dilation
Uniform cardiac distribution of pericardial cavity hydrostatic pressure
Formation of a barrier to stop infection
Facilitation of atrial filling by promoting negative pericardial pressure during ventricular systole
(pericardium + pleural fluid): formation of a system that automatically applies compensating hydrostatic pressures to the cardiac periphery when accelerating forces act
Pregunta 3
Pregunta
The thickness of the pericardium is [blank_start]1-2 mm[blank_end].
Respuesta
1-2 mm
Pregunta 4
Pregunta
Fibrous pericardium
Respuesta
made up from tough connective tissue
thick
thin
stong
fragile
composed mainly of three collagen layers, cross-woven at 150° to each other
Pregunta 5
Pregunta
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]
Respuesta
lungs
pleura coverings
pleural coverings
diaphragm
Pregunta 6
Pregunta
Visceral layer of serous pericardium = [blank_start]epicardium[blank_end]
Respuesta
epicardium
Pregunta 7
Pregunta
The heart is located in the .... mediastinum.
Respuesta
posterior
anterior
middle
superior
Pregunta 8
Pregunta
Fill in the gaps of the surfaces and of the margin/borders.
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
Respuesta
14
12
10
6
9-12
6-8
8-9
7-9
4
6
8
7-10
280 to 340 g (average 300 g)
230 to 280 g (average 250 g)
200 to 240 g (average 220 g)
230 to 280 g (average 220 g)
280 to 340 g (average 300 g)
180 to 240 g (average 200 g)
230 to 280 g (average 250 g)
Pregunta 10
Pregunta
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
Respuesta
17
20
at birth
5
12
Pregunta 11
Pregunta
-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].
Respuesta
interventricular grooves
atrio- ventricular (coronary) groove
interatrial groove (of Waterston)
Pregunta 12
Pregunta
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].
Respuesta
fifth left
midclavicular line
Pregunta 13
Pregunta
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.