Instructions for Dissection for Study of Male Reproductive System of Cockroach
Cut open the cockroach as described earlier. Separate the fat bodies on the side of the anterior region of abdomen and locate the bunch of testis, which can be distinguished by its different shape. Separate the alimentary canal slowly and remove it by cutting at the crop at one end and at the rectum at another. Detach lobes of testis from the sterna along with fat bodies with the help of needle and forceps. Pin down the whole mass of testis on both the sides. Gently shake the fat bodies near the base of the mass and observe vas deferens running as a thin straight whitish line. Separate the fate bodies with forceps and trace the vas deferens and lobes of the testis. Remove the remaining fat bodies in the abdomen and expose milky white, much branched mushroom gland. Remove the ventral nerve cord and observe club shaped conglobate. Trace the ejaculatory duct which is milky white in colour observe a pair of testes, a pair of vas deferentia, mushroom gland, ejaculatory duct and conglobate gland.