Did you know the lungs are a place where your blood platelets are developed? Previous thought was that the bone marrow was the home of the cells that make your platelets.

Recent finding: "The lung is a site of platelet biogenesis and a reservoir for haematopoietic progenitors "
http://www.nature.com/nature/journal/vaop/ncurrent/full/nature21706.html
Dr; Chris Centano explain in layman terms:
http://www.regenexx.com/turns-lungs-bioreactor-cells/

Platelets are critical for haemostasis, thrombosis, and inflammatory responses, but the events that lead to mature platelet production remain incompletely understood. The bone marrow has been proposed to be a major site of platelet production, although there is indirect evidence that the lungs might...