Putative Primo-vascular System in Mesentery of Rats

Ping An, Jingxing Dai, Zhendong Su, Jung Sun Yoo, Rongmei Qu, Sung Woo Lee, Ki Hoon Eom, Kyang Hee Bae, Hesheng Luo, Kwang Sup Soh

Research output: Journal article publicationJournal articleAcademic researchpeer-review

10 Citations (Scopus)


Primo-vessels have been observed in the rat abdominal cavity as floating thread like structures on and not adhering to fascia-wrapped internal organs. To date their presence, locations, and lengths have been irregular and unpredictable, and their identification not regularly repeatable, thus they have remained a nagging enigma in primo-vascular system research for several years. In this work, locations were found where primo-vessels were regularly present and observed repeatedly. These vessels were not floating or freely movable but lay in a regular position in the mesentery in the abdominal cavity of the rat, being observed between the cecum and small intestine and between the colon and mesentery root. The difference between a lymph vessel and a primo-vessel is described in anatomical and histological aspects. In addition, trypan blue was found to enter primo-vessels through the surrounding membranes and filled spaces between fibers comprising the primo-vessels. It is conjectured that the previously observed floating primo-vessels had anomalously and irregularly emerged, for some unknown physiological reasons, from primo-vessels normally located in the fascia-like mesentery.
Original languageEnglish
Pages (from-to)232-240
Number of pages9
JournalJAMS Journal of Acupuncture and Meridian Studies
Issue number4
Publication statusPublished - 1 Dec 2010
Externally publishedYes


  • Acupuncture
  • Lymph vessel
  • Mesentery
  • Primo-vascular system
  • Primo-vessel
  • Rat

ASJC Scopus subject areas

  • Complementary and alternative medicine
  • Anesthesiology and Pain Medicine


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