caa a22 4500 46908295X CHVBK 20180323132956.0 cr unu---uuuuu 170328e19921001xx s 000 0 eng 10.1007/BF00381891 doi (NATIONALLICENCE)springer-10.1007/BF00381891 The cytoarchitecture of the medial layer in rat thoracic aorta: a scanning electron-microscopic study [Elektronische Daten] [Takashi Fujiwara, Yasuo Uehara] Summary: The cytoarchitecture of the medial layer of rat thoracic aorta was examined by scanning electron microscopy after removal of the connective tissue. The outermost lamella showed a lattice-like structure of muscle bundles of closely apposed smooth muscle cells (SMCs), whereas the inner lamellae consisted of more-or-less continuous muscle sheets of vaguely defined subgroups of parallel SMCs. Longitudinal rows of ridges ran along the adventitial surface of these muscle bundles and sheets. The SMCs of the outermost lamella, were 5.1 μm wide, and varied in shape, whereas those of the inner lamellae, were 52.7 μm long, 2.6 μm wide and 4.1 μm thick, and were elongated, spindle-shaped cells with serrated outlines. These latter SMCs extended obliquely, and partially overlapped each other. The surface of the SMCs in the outermost lamella exhibited a rugged texture, with nodular protrusions and oblique and longitudinal laminar folds, while the inner lamellar cells showed longitudinal laminar folds and finger-like processes on both sides of the ridges, pointing in opposite directions to the ridges. The angle of deviation from the transverse axis of the vessel, of the muscle bundles and subgroups in the outermost lamella, was 33.6°, in the second and third lamellae, 22.5°, and in the innermost lamellae, 12.8°. The mean angle of the muscle bundle and subgroup arrangement, with respect to the long axis of the vessel, however, was basically 90° in all lamellae. Springer-Verlag, 1992 Thoracic aorta nationallicence Smooth muscle cell nationallicence Cytoarchitecture nationallicence Morphometry nationallicence Rat (Wistar) nationallicence Fujiwara Takashi Laboratory Animal Center, School of Medicine, Ehime University, Shigenobu, 791-02, Ehime, Japan aut Uehara Yasuo Department of Anatomy, Kumamoto University, Medical School, 860, Kumamoto, Japan aut Cell and Tissue Research Springer-Verlag 270/1(1992-10-01), 165-172 0302-766X 270:1<165 1992 270 441 https://doi.org/10.1007/BF00381891 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00381891 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Fujiwara Takashi Laboratory Animal Center, School of Medicine, Ehime University, Shigenobu, 791-02, Ehime, Japan aut NATIONALLICENCE 700 1- Uehara Yasuo Department of Anatomy, Kumamoto University, Medical School, 860, Kumamoto, Japan aut NATIONALLICENCE 773 0- Cell and Tissue Research Springer-Verlag 270/1(1992-10-01), 165-172 0302-766X 270:1<165 1992 270 441 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer