Which of the following statements about blood vessels is correct?
- Aarteries always carry oxygenated blood: yes; the pulmonary vein carries deoxygenated blood: yes
- Barteries always carry oxygenated blood: yes; the pulmonary vein carries deoxygenated blood: no
- Carteries always carry oxygenated blood: no; the pulmonary vein carries deoxygenated blood: yes
- Darteries always carry oxygenated blood: no; the pulmonary vein carries deoxygenated blood: no