Thorax 07: Heart Anatomy Flashcards
Which section of the mediastinum is the heart located in?
Middle mediastinum
What structures are located in the superior mediastinum?
Thymus, great vessels, vagus and phrenic nerves, cardiac plexus, left recurrent laryngeal nerve, trachea, esophagus, thoracic duct, left superior intercostal vein, prevertebral muscles, lymph
What structures are located in the middle mediastinum?
Pericardium and its contents
What separates the superior mediastinum from the middle mediastinum?
Sternal angle
Mediastinal pleura
A layer of connective tissue that covers the mediastinum
Pericardium
A small serous celom that surrounds the heart
Where is the visceral layer of the pericardium?
Epicardium of the heart
Where is the parietal layer of the pericardium?
Mediastinal wall
What is the normal amount of fluid in the pericardial cavity?
50 ml
Serous pericardium
The celomic bag itself
Fibrous pericardium
Outside the serous pericardium that provides resistance against deformation
Cardiac tamponade
Compression of the heart as the result of rapid accumulation of fluid within the pericardium
What are the veins that drain into the right atrium?
Superior vena cava, inferior vena cava, coronary sinus, anterior cardiac vein, smallest cardiac vein
Auricle
A remnant of the primitive right atrium that is above the right atrium
Sinus venarum
Derived from the right horn sinus vnarum; found in the right atrium
Musculi pectinati
Ridges on the heart wall of the atria
Crista terminalis
A ridge of smooth myocardium in the right atrium
Sulcus terminalis
A shallow groove on the outside of the right atrium
Tricupsid valve
A valve between the atrium and ventricle; atriaventricular valve