Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Illustration of pulmonary arteries and veins. (a) Contrast-enhanced chest CT scan showing left upper lobe vessels; (b) The arteries, veins, and airways labeled manually; (c) The intrapulmonary vessels without differentiation of the arteries and veins; and (d) Inclusion of the extrapulmonary artery and vein.
