Neuroimmunology
Chronic fatigue syndrome
Dec. 12, 2023
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Variation in development of aortic arch and great vessels (3)
This diagram shows another variation in development of the aortic arch and great vessels (persistence of the distal portion of the right aortic arch, resulting in the origin of the right subclavian artery from the descending aorta, distal to the left subclavian origin): (A) aorta, (LS) left subclavian artery (P) pulmonary artery, (RS) right subclavian artery, (RV) right vertebral artery. Persistence of the distal portion of the right aortic arch and disappearance of a portion of its proximal part produces an apparent origin of the right subclavian artery from the descending aorta. (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.)