AMI IMAGES / SCIENCE PHOTO LIBRARY AMI IMAGES / SCIENCE PHOTO LIBRARY
Kneecap bone marrow. Transmission electron micrograph of a section through an area of bone marrow near the cartilage/bone interface in a kneecap (patella), with a blood vessel visible at centre. Bone marrow is a tissue found at the centre of certain bones. It is the site of blood cell production (haematopoiesis).
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