1, The trachea or windpipe; 2 and 3, right and left common carotid arteries; 4 and 5, right and left sub clavian arteries; 6, innominate artery; 7 and 8, right and left innominate veins; 9, Superior vena cava; 10, arch of the aorta; 11, ascending aorta; 12, pulmonary artery; 13, right atrium and auricula; 14 and 15, right and left lung; 16, conus arteriosus; 17, right ventricle; 18, left ventricle.

Heart and Lungs

1, The trachea or windpipe; 2 and 3, right and left common carotid arteries; 4 and 5, right and left…

"The three branches from left to right are the unnamed ones. The primitive left carotid and the subclavian left one. The small branch in the cure is the bronchial one." — Richardson, 1906

Thoracic Aorta

"The three branches from left to right are the unnamed ones. The primitive left carotid and the subclavian…