Bone marrow-derived cells can rapidly enter the systemic circulation, but how this is achieved is unclear. Grüneboom et al. identify tiny capillaries, termed trans-cortical vessels (TCVs), that connect the bone marrow cavity to the systemic vasculature, and show that the majority of blood in long bones passes through TCVs.
- Anika Grüneboom
- Ibrahim Hawwari
- Matthias Gunzer
