Assertion: circulatory system's vein | /r/HasProperty | exception
Facets:
value: to this rule
type: OTHER
Source sentences:
text: However, the pulmonary arteries and pulmonary veins are an exception to this rule because the pulmonary veins transport oxygenated haemoglobin(blood) to the heart and the pulmonary arteries transport unoxygenated haemoglobin away from the heart.