Dr. Terry Sweeney of the University's Biology Department presented a research seminar  on creating a mechanical model of the cardiovascular system for hands-on learning.  Physiologists appreciate the distinct and essential roles of the elements that comprise the cardiovascular system and ensure its successful function. Nevertheless, clarifying and demonstrating to the student of physiology those critical cardiac and vascular elements, and the role of each element in systemic function, often is a difficult task. We have developed a mechanical model of the cardiovascular system that greatly facilitates the instruction of cardiovascular physiology. Our approach has been to use a computer-assisted model that is dynamic, visual, tactile and highly interactive. The water-circulating model has manipulatable cardiac, vascular and system volume parameters. Its mechanical elements and its computer-driven interface, utilizing PowerLab (ADInstruments) hardware and software run on an iMac (Apple) computer, enables the student to manipulate critical cardiovascular parameters and to see the effects of those manipulations displayed in real time, both on the computer display and within the see-though elements of the system. For example, student may manipulate essential cardiac parameters such as heart rate and contraction strength, as well as demonstrate the operation of "skeletal muscle" and "thoracic" venous pumps that are so essential to proper cardiac filling. Directly measured cardiac output, ventricular and vascular pressures, as well as other calculated cardiovascular parameters, are displayed quantitatively in real time. The impact of systemic parameters on cardiac filling is assessed via observation of the plexiglass-enclosed beating ventricle. The model incorporates manipulatable "windkessel" sealed air chamber systems to model distinct, real-life characteristics of the arterial and venous elements of the vascular system. Through these and other system elements, the student can directly determine and compare the functions of major arteries and veins, as well as assess the effects of alteration of vascular resistance on cardiovascular performance. Our model enhances the teaching of cardiovascular physiology at the undergraduate, doctoral and trainee level. It also facilitates community outreach, educating community constituents about critical elements of the cardiovascular system and how they relate to common cardiovascular health concerns.