心肌细胞横切面积的长轴，随心肌细胞体积的增加而逐渐增大；
The major axis of cross-section area of myocytes was enlarged but the minor cross-section diameter did not show any more changes.
结论：血管横切面积缩小及血流量降低在老年ed流行病学中起重要作用。
Conclusions: The narrowed vessel section area and lowered blood flow volume play important roles on Ed epidemiology of elderly patients.
正常心肌细胞的生长，是由于细胞的长度和横切面积的增加，从而使心肌细胞体积增大。
Physiological growth of normal cardiac myocytes was due to increase in cell volume, i. e. the cell length and cross-section area were enlarged.
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