Question

How many of the following structures/organs belong to the male reproductive system of a cockroach?
[Utricular gland, spermatheca, oothecal chamber, Phallic gland, seminal vesicles]

• A. None
• B. one
• C. Two
• D. Three

Answer 1

Answer: (D)

Three structures/organs belong to the male reproductive system of the cockroach - The utricular gland, phallic gland, and seminal vesicles.
The male reproductive system of cockroach consists of
A. Testis (1 pair) - Each testis extend from 4^th to 6^th abdominal segment. (NCERT Correction)
B. Vasa deferentia (1 pair) - Each vasa deferens open into the ejaculatory duct via a seminal vesicle.
C. Seminal vesicles (1 pair) - Both seminal vesicles are surrounded by a large number of small finger-like processes. This structure is known as the utricular gland or mushroom gland. In the seminal vesicles, sperms are stored and glued together in the form of spermatophores which are discharged during copulation.
D. Mushroom glands or utricular glands - Located in 6^th -7^th abdominal segments. These act as an accessory reproductive gland.
E. Ejaculatory duct (Single) - Both seminal vesicles form a single ejaculatory duct that opens in the genital chamber.
F. Genital atrium or genital chamber.
G. External genitalia or gonapophyses or phallomeres (3 in number) - There are 3 asymmetrical chitinous structures that surround the male gonopore. These structures help in copulation.