1973 年 38 巻 4 号 p. 667-675
Endothelium lines the inner surface of the canine aorta as a pavement of flattened cells. In the intercellular junction, there are regions where the adjacent membranes are quite dense and appear rather firmly attached to each other. The cytoplasm has the usual content of organelles: mitochondria, smooth or rough elements of endoplasmic reticulum, Golgi complex, centrioles. A characteristic feature of the endothelial cell is a large number of vesicles, either smooth or coated, scattered throughout the cytoplasm. Large numbers of solid cytoplasmic filaments (diameter of 40 or 75Å) and microtubules (230Å in diameter) are also found in the endothelial cells. Tubulated bodies approximately 0.1μ in diameter and up to 0.3μ in length are sparsely scattered within the cytoplasm. Unusual membrane-bound large microtubular bodies 0.5-0.8μ in diameter are also found. Crystalline structures are present in aggregates. It has a periodicity in the range of 130-180Å.