Explain the reproductive system of a male cockroach.

(N/A) The male reproductive system of a cockroach consists of a pair of testes,vasa deferentia,an ejaculatory duct,seminal vesicles,the accessory glands,and external genitalia.
$1$. Testes: $A$ pair of testes is located in the $4^{th}$ to $6^{th}$ abdominal segments.
$2$. Vasa Deferentia: From each testis,a thin vas deferens arises,which opens into the ejaculatory duct through the seminal vesicles.
$3$. Seminal Vesicles: These store the sperms in the form of bundles called spermatophores.
$4$. Ejaculatory Duct: This duct opens into the male gonopore situated ventral to the anus.
$5$. Accessory Glands: $A$ characteristic mushroom-shaped gland is present in the $6^{th}-7^{th}$ abdominal segments,which functions as an accessory reproductive gland.
$6$. External Genitalia: These are represented by male gonapophysis or phallomeres (chitinous asymmetrical structures) surrounding the male gonopore.