Blood can either be shunted from the systemic circulation to pulmonary circulation (left-to-right shunt) or between the pulmonary circulation and systemic circulation (right-to-left shunt).
A BLUF (Bottom Line Up Front) is a paragraph where the conclusions and recommendations are placed at the beginning of the text, rather than the end, in order to facilitate rapid decision making. This differs from an older, more-traditional style in which conclusions and recommendations are included at the end, following the arguments and considerations of facts.
1 An acronym for Bottom Line in advance this is certainly frequently employed in casual military correspondence and internal/informal business e-mails to cover the primary things of an e-mail and so the reader can very quickly determine what the e-mail says before reading the complete, long email. by Ronnie Report definition.