| Summary: | Salivary glands are a feature of terrestrial species, their structure being different depending on the species and diet. In special literature we did not found informations about the acini polymorphism in sublingual gland, therefore we consider it appropriate to do a morphometric study in some rodents. In this study, we harvested the sublingual glands of three males of the following species: guinea pig, Wistar rat, mouse, rabbit and chinchilla. The pieces were histologically processed in order to evaluate them. For for measuring and counting the acini, we used AmScope software. The results emphasize that the highest number of acini is found in mouse, followed by chinchilla, Wistar rat, rabbit and then guinea pig. Regarding the dimensions, the biggest acini are found in guinea pig, being also the most polymorphic ones, followed by rabbit, Wistar rat, chinchilla and the smallest acini are found in mouse. We did not find any statistically significant differences between the size of the acini in rabbit with guinea pig and chinchilla with Wistar rat, but when comparing guinea pig with Wistar rat, chinchilla and mouse, and also when comparing rabbit with Wistar rat and mouse, we found that there were highly statistically significant differences. When comparing the rabbit with chinchilla, recorded values were statistically significant.
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