Page 726 - Fundamentals of anatomy physiology

Figure 20–2 The Location of the Heart in the Trachea Chapter 20 The Heart 713

Thoracic Cavity. ATLAS: Plates 47a,b Thyroid gland

First rib (cut)

Base of heart Left lung
Apex of heart
Right lung Diaphragm

Parietal pericardium
(cut)

a An anterior view of the chest, showing
the position of the heart and major blood
vessels relative to the ribs, lungs, and diaphragm.

Posterior mediastinum

Esophagus Aorta (arch segment removed)

Right pleural cavity Left pulmonary artery

Right Left pleural cavity
lung Left
lung

Left pulmonary vein

Bronchus of lung

Right pulmonary artery Aortic Pulmonary trunk
arch
Right pulmonary vein Left atrium
20
Superior vena cava Left ventricle
Right atrium Pericardial cavity
Right ventricle Epicardium
Anterior mediastinum Pericardial sac
Sternum

b A superior view of the organs in the mediastinum; portions of the lungs have been removed to reveal blood vessels
and airways. The heart is located in the anterior part of the mediastinum, immediately posterior to the sternum.

Base of heart Cut edge of Wrist (corresponds
parietal pericardium to base of heart)
Fibrous attachment
to diaphragm Fibrous tissue of Inner wall (corresponds
pericardial sac to epicardium)

Parietal pericardium Air space (corresponds
Areolar tissue to pericardial cavity)
Mesothelium
Outer wall (corresponds
Cut edge of epicardium to parietal pericardium)

Apex of heart Balloon

c The relationship between the heart and the pericardial cavity; compare with the fist-and-balloon example.