Marino T A, Biberstein D, Cook P N, Cook L, Dwyer S J
Anat Rec. 1981 Sep;201(1):31-42. doi: 10.1002/ar.1092010105.
Cells located in the interatrial septum of the ferret heart were examined and mean cell volume, surface area, length, width, as well as cell length/width and surface area/volume ratios were obtained. The muscle cells were from two different regions. One region was the area of the middle internodal tract while the other was from the area where the anterior and middle internodal tracts intermingled. Based on the data obtained, at least two different subpopulations of interatrial muscle cells could be defined. The larger cells had a mean cell length of 109.7 micrometer, a mean cell width of 13.1 micrometer, a length/width ratio of 8.61, a mean cell surface area of 5,057.6 micrometer2, a mean cell volume of 5960.8 micrometer3, and a surface area/volume ratio of 0.87. The smaller cells had a mean cell length of 58.0 micrometer, a mean cell width of 12.2 micrometer, a length/width ratio of 4.85, a mean cell surface area of 2494.1 micrometer2, a mean cell volume of 2553.6 micrometer3, and a surface area/volume ratio of 1.00. The large cell population had cells that were myofibril rich and also others that were myofibril poor. These quantitative data indicate that the regions of internodal pathways are not composed of a single specialized cell type, but rather are composed of at least two, if not more, cell types that intermingle with each other.
对雪貂心脏房间隔中的细胞进行了检查，并获得了平均细胞体积、表面积、长度、宽度以及细胞长宽比和表面积与体积比。这些肌肉细胞来自两个不同区域。一个区域是中间结间束区域，另一个区域是前结间束和中间结间束相互交织的区域。根据获得的数据，可以定义至少两种不同的房间隔肌细胞亚群。较大的细胞平均细胞长度为109.7微米，平均细胞宽度为13.1微米，长宽比为8.61，平均细胞表面积为5057.6平方微米，平均细胞体积为5960.8立方微米，表面积与体积比为0.87。较小的细胞平均细胞长度为58.0微米，平均细胞宽度为12.2微米，长宽比为4.85，平均细胞表面积为2494.1平方微米，平均细胞体积为2553.6立方微米，表面积与体积比为1.00。大细胞群体中有的细胞富含肌原纤维，也有肌原纤维较少的细胞。这些定量数据表明，结间通路区域并非由单一的特殊细胞类型组成，而是由至少两种（甚至更多）相互交织的细胞类型组成。
