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THE JUXTA-EPIPHYSIAL VESSELS IN THE LONG BONES OF FOETAL RATS

M. Brookes 1; and D. N. Landon 1

1 The Anatomy Department, Guy's Hospital Medical School, London

1. The results of the present investigation indicate that in the foetal rat the juxta-epiphysial vascular bed consists of a dense irregular network of sinusoids in direct contact with the growth cartilage, supplied by end-arteries, and drained by a profusion of metaphysial sinusoids.

2. The circulation is a closed one—that is, the endothelium is unbroken in its continuity and microhaemorrhages do not occur against the cartilage.

3. It is possible that juxta-epiphysial endothelial cells or their derivatives are chondrolytic, and that they participate directly, together with other mesenchymal derivatives, in the removal of cartilage as a preparatory stage in enchondral bone formation.
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Hip, Knee, Trauma, Upper limb, Foot & Ankle, Paediatrics, Oncology, Spine, Arthroplasty, General