Anatomy All of the following statements about Diploic veins are true, except: A Develop around 8th week of gestation B These have no valves (valveless) C Present in cranial bones D Have a thin wall lined by a single layer of endothelium 💡 Explanation All of the following statements about Diploic veins are true, except: ✓ Correct Answer: A. Develop around 8th week of gestation