THE THORAX AND THORACIC VISCERA. 85 



Coronary Sinus : 



Right marginal vein, or anterior cardiac vein, or vein of Galen. 



Smaller anterior cardiac veins. 

 Oblique vein. 

 Cardiac nerves, 975-6. (953-5) 



Deep cardiac plexus. 



Superficial cardiac plexus. Cardiac ganglion of Wrisberg. 



Coronary plexuses. 



Lymphatics of the heart, 697. (682) 

 Peculiarities of the Foetal Heart, 977-8. (955-6-7) 



Position. 



Weight. 



Auricular portion. Right auricle. 



Ventricular walls. 



Foramen ovale. Valve of the foramen ovale. 



Eustachian valve. 



Ductus arteriosus. 



The fcetal circulation. 

 The position of the Chief Orifices one to the other and to the Chest Wall, 972. 



Fig- 554- (95 - 1 ) 



Pulmonary orifice. Aortic orifice. 

 Pulmonary semilunar valves. 

 Aortic semilunar valves. 

 Tricuspid valve. 

 Mitral valve. 

 Muscular walls. 



Study the structure of the trachea, bronchi, and lungs, and the arrangement of the vessels and air tubes 

 in the lungs. Trace the pulmonary artery and its divisions, and the pulmonary vein and its tributaries. 



The trachea: 



Structure, 9512. (9301) 



Cartilaginous rings. Fibrous membrane. 



First cartilage. 



Last cartilage. 



Fibres of the trachealis. 



Yellow elastic fibres. 



Mucous membrane. 



Arteries. 



Veins. 



Nerves. 



The bronchi, 952. (931) 



Right bronchus. ,, , . , 



Bronchioles. 

 Left bronchus. 



The lungs, 961-2. (940) 

 Weight of the lungs. 

 Color. 

 Structure: 



Serous coat. 

 Subserous layer. 

 Parenchyma : 



Minute lobules: 



Bronchial tube with terminal air cells. 

 Pulmonary and bronchial vessels, nerves, and lymphatics. 

 The vessels : 



Pulmonary arteries. 



Radicles of the pulmonary veins. Arterial blood. 

 Bronchial arteries. 

 Bronchial veins : 

 Superficial. 



