Fluid Dynamics is a discipline that has increasing importance in biology. The aim of this course is to introduce newcomers to Bio-fluid Mechanics and also to present a state of the art as well as the latest development in the field. In this Lecture Series, initial presentations will provide a theoretical background on respiratory and cardiovascular Biofluid Mechanics. They will be followed by extensive courses on experimental and numerical modelling of the circulatory system and flows within the lung. These courses will be illustrated by applications such as mechanical ventilation and aerosol depositions in the alveoli with in vivo and in vitro measurements techniques that can be used to characterise the flow.