🦴🪀

#bone marrow #red marrow #blood production #life source #inside bone #stem cells

🦴🧬

#bone marrow #stem cells #medical transplant #leukemia treatment

🦴🩸🧬

#hematopoiesis #bone marrow #stem cells #blood production #blood origin #blood genetics

♻️〰️👀

#planarian regeneration #regenerating worm #flatworm biology #stem cells #biological immortality