Large vein (vena cava)
Because this large vein is sectioned longitudinally, the orientation of the smooth muscle fibers is reversed from that shown in the previous cross sections. In this orientation, longitudinally-oriented smooth muscle fibers in tunicae intima and adventitia are seen in longitudinal section, and the circularly arranged smooth muscle in the tunica media is seen in cross section. This section was stained for elastic fibers, thus an internal elastic lamina, which is present in larger veins, is prominent. 100x, 250x
Tunica intima
Because this large vein is sectioned longitudinally, the orientation of the smooth muscle fibers is reversed from that shown in the previous cross sections. In this orientation, longitudinally-oriented smooth muscle fibers in tunicae intima and adventitia are seen in longitudinal section, and the circularly arranged smooth muscle in the tunica media is seen in cross section. This section was stained for elastic fibers, thus an internal elastic lamina, which is present in larger veins, is prominent. 100x, 250x
- Endothelium
Because this large vein is sectioned longitudinally, the orientation of the smooth muscle fibers is reversed from that shown in the previous cross sections. In this orientation, longitudinally-oriented smooth muscle fibers in tunicae intima and adventitia are seen in longitudinal section, and the circularly arranged smooth muscle in the tunica media is seen in cross section. This section was stained for elastic fibers, thus an internal elastic lamina, which is present in larger veins, is prominent. 100x, 250x
- Smooth muscle fibers
Because this large vein is sectioned longitudinally, the orientation of the smooth muscle fibers is reversed from that shown in the previous cross sections. In this orientation, longitudinally-oriented smooth muscle fibers in tunicae intima and adventitia are seen in longitudinal section, and the circularly arranged smooth muscle in the tunica media is seen in cross section. This section was stained for elastic fibers, thus an internal elastic lamina, which is present in larger veins, is prominent. 100x, 250x
- Internal elastic lamina
Because this large vein is sectioned longitudinally, the orientation of the smooth muscle fibers is reversed from that shown in the previous cross sections. In this orientation, longitudinally-oriented smooth muscle fibers in tunicae intima and adventitia are seen in longitudinal section, and the circularly arranged smooth muscle in the tunica media is seen in cross section. This section was stained for elastic fibers, thus an internal elastic lamina, which is present in larger veins, is prominent. 100x, 250x
Tunica media
Because this large vein is sectioned longitudinally, the orientation of the smooth muscle fibers is reversed from that shown in the previous cross sections. In this orientation, longitudinally-oriented smooth muscle fibers in tunicae intima and adventitia are seen in longitudinal section, and the circularly arranged smooth muscle in the tunica media is seen in cross section. This section was stained for elastic fibers, thus an internal elastic lamina, which is present in larger veins, is prominent. 100x, 250x
- Smooth muscle fibers
Because this large vein is sectioned longitudinally, the orientation of the smooth muscle fibers is reversed from that shown in the previous cross sections. In this orientation, longitudinally-oriented smooth muscle fibers in tunicae intima and adventitia are seen in longitudinal section, and the circularly arranged smooth muscle in the tunica media is seen in cross section. This section was stained for elastic fibers, thus an internal elastic lamina, which is present in larger veins, is prominent. 100x, 250x
Tunica adventitia
Because this large vein is sectioned longitudinally, the orientation of the smooth muscle fibers is reversed from that shown in the previous cross sections. In this orientation, longitudinally-oriented smooth muscle fibers in tunicae intima and adventitia are seen in longitudinal section, and the circularly arranged smooth muscle in the tunica media is seen in cross section. This section was stained for elastic fibers, thus an internal elastic lamina, which is present in larger veins, is prominent. 100x, 250x
- Smooth muscle fibers
Because this large vein is sectioned longitudinally, the orientation of the smooth muscle fibers is reversed from that shown in the previous cross sections. In this orientation, longitudinally-oriented smooth muscle fibers in tunicae intima and adventitia are seen in longitudinal section, and the circularly arranged smooth muscle in the tunica media is seen in cross section. This section was stained for elastic fibers, thus an internal elastic lamina, which is present in larger veins, is prominent. 100x, 250x
- Connective tissue
Because this large vein is sectioned longitudinally, the orientation of the smooth muscle fibers is reversed from that shown in the previous cross sections. In this orientation, longitudinally-oriented smooth muscle fibers in tunicae intima and adventitia are seen in longitudinal section, and the circularly arranged smooth muscle in the tunica media is seen in cross section. This section was stained for elastic fibers, thus an internal elastic lamina, which is present in larger veins, is prominent. 100x, 250x
- Elastic fibers
Because this large vein is sectioned longitudinally, the orientation of the smooth muscle fibers is reversed from that shown in the previous cross sections. In this orientation, longitudinally-oriented smooth muscle fibers in tunicae intima and adventitia are seen in longitudinal section, and the circularly arranged smooth muscle in the tunica media is seen in cross section. This section was stained for elastic fibers, thus an internal elastic lamina, which is present in larger veins, is prominent. 100x, 250x
PREVIOUS