Developmental Malformations
Lissencephalies
Nov. 22, 2024
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Variation in development of aortic arch and great vessels (2)
This diagram shows another variation in development of the aortic arch and great vessels (right aortic arch associated with disappearance of the proximal portion of the left arch): (A) aorta, (LS) left subclavian artery, (P) pulmonary artery, (RS) right subclavian artery. The left subclavian artery arises from the descending aorta, which lies on the right side of the vertebral column, and passes to the left behind the trachea and esophagus. (Contributed by Dr. Douglas Lanska. Source: Dwight T, McMurrich JP, Hamann CA, Piersol GA, White JW, Heisler JC. Human Anatomy: Including Structure and Development and Practical Considerations. Vol. 1. Philadelphia and London: J.B. Lippincott Co., 1907.)