Endo H, Yamada T K, Nakamuta N, Tanemura K, Kurohmaru M, Hayashi Y
Department of Zoology, National Science Museum, Tokyo, Japan.
J Vet Med Sci. 1996 Oct;58(10):937-40. doi: 10.1292/jvms.58.10_937.
The testis of a greater Indian rhinoceros (Rhinoceros unicornis) was examined by naked eyes and light microscopy. The animal sampled was estimated to be 42 years old. Testis was ellipse-shaped and weighed 1,300 g. Although a number of elongated spermatids were distinguishable in some seminiferous tubules, the lumen of seminiferous tubules was closed and connective tissues conspicuously increased in amount in the intertubular space. These findings in testicular morphology of the animal may be due to ageing.
对一头大独角犀（印度犀，Rhinoceros unicornis）的睾丸进行了肉眼和光学显微镜检查。所采样的动物估计为42岁。睾丸呈椭圆形，重1300克。虽然在一些生精小管中可分辨出一些延长的精子细胞，但生精小管的管腔是封闭的，且管间间隙中结缔组织的量明显增加。该动物睾丸形态的这些发现可能是由于衰老所致。
