单语范例（未经PONS编辑处理）
These exchangers equalise the temperature between hot arterial blood going out to the extremities and cold venous blood coming back, thus reducing heat loss.
en.wikipedia.org Venous blood from the ileum goes straight into the portal vein and then into the liver sinusoids.
en.wikipedia.org As with heart ultrasound (echocardiography) studies, venous ultrasonography requires an understanding of hemodynamics in order to give useful examination reports.
en.wikipedia.org The external vertebral venous plexuses travel inferiorly from this suboccipital region to drain into the brachiocephalic vein.
en.wikipedia.org Lower was the first to observe the difference in arterial and venous blood.
en.wikipedia.org