Thus, during the different phases of sexual cycle, the ultrastructural features of acinar cells of bulbo-urethral gland show no marked differences in the secretory apparatus.
Cyclic histological changes in bulbo-urethral gland have been studies in few species of bats.
In bulbo-urethral gland of Rousettus, release of secretory product into lumen both by apocrine and merocrine mode.
In Rousettus, secretory cells of acini of bulbo-urethral gland during different phases of reproductive cycle show well developed complexus golgiensis and extensive development of rough endoplasmic reticulum and mitochondria indicate that these secretory cells are involved in synthesis and secretion of secretory products.
From the above discussion, it is suggested that secretory materials synthesis by bulbo-urethral gland of bat, Rousettus may be involved in various reproductive processes like maturation and survival of spermatozoa (Gupta, 1974), regulation of sperm metabolic activity and the maintaining of structural integrity of acrosomal and plasma membrane (Badia et al., 2005) and sperm egg interactions (Topfer-Petersen, 1999).