system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
All are true about Diploic veins EXCEPT:
assistant
The correct answer is  Diploic veins sta developing in the cranial bones at about 2 years of age and are fully developed at the age of 35 years. These are lined by a single layer endothelium suppoed by elastic tissue and are valveless.