Biofluid mechanics is the branch of biology which applies fluid mechanics to the sutdy of biological phenomena and the use of their concepts to understand these phenomena. The theory of fluid mechanics provides a means of describing the motion of fluids in biological processes in terms consistent with their functions. This book contains recent developments in this area. Topics to be covered include: a numerical heart and circulation model to simulate haemodynamics for rate-responsive pacing; orifice flow in stenotic and regurgitant valve lesions; folding motifs, kinetics, and function of the proximal nephron; numerical simulation of arterial haemodynamics; evaluation of haemodialysis systems using computer simulation; coupled behaviour of pulmonary circulation with breathing dynamics; three-dimensional simulation of intraventricular flow fields; micropolar fluid model for the brain fluid dynamics; and computer modelling of cardiac excitation.