Zagzag D
Department of Pathology, Kaplan Comprehensive Cancer Center, New York University Medical Center, New York.
Am J Pathol. 1995 Feb;146(2):293-309.
"Blood vessels have the power to increase within themselves which is according to the necessity whether natural or diseased. As a further proof that this is a general principle, we find that all growing parts are much more vascular than those that are come to their full growth; because growth is an operation beyond the simple support of the part. This is the reason why young animals are more vascular than those that are full grown. This is not peculiar to the natural operation of growth, but applies also to disease and restoration."
血管有根据自身需要（无论是自然的还是患病的）进行自身扩张的能力。作为这是一个普遍原则的进一步证据，我们发现所有正在生长的部位比那些已经发育完全的部位血管丰富得多；因为生长是一种超越该部位简单维持的活动。这就是幼小动物比成年动物血管更丰富的原因。这并非生长的自然活动所特有，疾病和恢复过程也适用。
