What is the references for the blood circulatory system consists of small tubular structures responsible for carrying blood known as blood vessels. Some intercellular fluid (tissue fluid), however does not re-enter capillaries or veins directly, is picked up by thin-walled blind ended lymph vessels?
And what was the universities they discovered these references?
The information you've described regarding the blood circulatory system and the lymphatic system is a well-established medical and biological understanding that has been developed over centuries through the work of many scientists and researchers. There may not be a single reference or discovery point since this knowledge is a culmination of observations and research over time.
However, one of the earliest and most influential discoveries related to the circulatory system was made by the English physician William Harvey. His work "Exercitatio Anatomica de Motu Cordis et Sanguinis in Animalibus" (Anatomical Exercise on the Motion of the Heart and Blood in Animals), published in 1628, described the systemic circulation and properties of blood being pumped to the brain and body by the heart. William Harvey studied at the University of Padua, which was a leading institution for anatomical studies and medical research at the time.
Regarding the lymphatic system, the discovery of lymph vessels is attributed to the Italian physician Gaspare Aselli, who observed them in the intestines of dogs during live dissections around 1622, which he described in his work "De lactibus sive lacteis venis". Subsequent contributions to the understanding of the lymphatic system were made by other anatomists and physicians such as Olaus Rudbeck and Thomas Bartholin in the 17th century, who independently discovered and elucidated the function of the lymphatic system.
References to these foundational discoveries can be found in various medical and biology textbooks, as well as historical documents concerning the history of medicine. Many current studies on the circulatory and lymphatic systems are carried out at institutions worldwide; thus, there can be a multitude of sources and universities associated with more recent findings. For modern references, peer-reviewed journals and textbooks in human anatomy and physiology would be appropriate places to look for detailed information on these systems.