A Portion of the Pulmonic Circulation
A portion of the pulmonic circulation. 1, A branch of the artery that carries the impure blood to the lungs. 3, Capillary vessels. 2, A vein through which red blood is returned to the left side of the heart.
Cutter, Calvin First Book on Analytic Anatomy, Physiology and Hygiene, Human and Comparative (Philadelphia: J. B. Lippincott & Co., 1875) 119