Experimental Studies of the Bone Marrow
Chishiro Miyoshi · Okayama Igakkai Zasshi (Journal of Okayama Medical Association) · 1954
The study on the vascular structure in the bone marrow was performed mainly on the marrows of the femurs taken from frogs (Rana nigromaculata nigromaculata), newts (Triturus pyrrhogaster), birds (Uroloncha domestjca Flower) and lizards (Eumeces latisculatus latisculatus) by making cleared specimens according to Spalteholz's method and by series of continuous specimens. The results were as follows:1) The vasular structure in frogs (Rana nigromaculata nigromaculata), newts (Triturus pyrrhogaster), birds (Uroloncha domestica Flower) and lizards (Eumeces latisculatus latisculatus) were almost similar to mammals.2) In frogs (Rana nigromaculata nigromaculata) the nutrient artery did not take the same route as the nutrient vein, but took different ones when entering the femur marrow. The nutrient artery was always single while there were few nutrient veins and its number differed according to the individual. In some frogs (Rana nigromaculata nigromaculata) there were as many as 3 or 4 nutrient foramens.3) When the ends of the branches from the artery, which passes through the sinusoid distributed among the osteoid trabeculae of the metaphysis comes to its end, it takes a 180° turn and the lumen suddenly enlarges before it joins the sinusoid network.4) The frog (Rana nigromaculata nigromaculata) has a specified wall even in the sinusoid and is not always fully opened in the parenchymal tissue. So I believe in the theory that it has a specified wall with partial openings.