This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Circulation, Subject name: Physiology
Which of the following characteristics distinguishes somatic capillaries from visceral capillaries? 
Select and explain. 
A. Presence or absence of fenestrae, B. Size of the lumen, C. Thickness of the vessel wall, D. Presence or absence of pericytes
A: Presence or absence of fenestrae
Answer: A: Presence or absence of fenestrae 
Explanation: Somatic (continuous) capillaries lack fenestrae, whereas visceral (fenestrated) capillaries are characterized by their presence. Both types of capillary possess a continuous basal lamina and are surrounded by occasional pericytes.