Figure shows a schematic plan of blood circulation in humans with labels A to D. Identify the label and give its function/s.
B-Pulmonary artery- takes blood from heart to lungs, PO2 = 90mm Hg
C-Vena Cava- takes blood from body parts to right auricle, PCO2 = 45mm Hg
D-Dorsal aorta- takes blood from heart to body parts, PO2 = 95mm Hg
A- Pulmonary vein - takes impure blood from body parts, PO2 = 60mm Hg
In the schematic of double circulation, the Vena Cava collects deoxygenated blood from the body parts and delivers it to the right atrium (auricle). The partial pressure of carbon dioxide () in deoxygenated blood is 45 mm Hg and the partial pressure of oxygen () is 40 mm Hg . The Pulmonary Artery carries deoxygenated blood (pO2 = 40 mm Hg), not 90 mm Hg. The Pulmonary Vein carries oxygenated (pure) blood, not impure blood .
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