Explain the female reproductive system of cockroach
Answers
Female Reproductive Organs of Cockroach: The female reproductive system of cockroach consists of a pair of ovaries, vagina, genital pouch, collaterial glands, spermathecae and the external genitalia. ... Each ovary is formed of a group of eight ovarian tubules or ovarioles containing a chain of developing ova.
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→ It consists of 2 large ovaries, Oviducts, spermatheca, genital chamber, Collaterial glands etc.
→ Ovaries lie laterally in the 2nd - 6th abdominal segments.
→ Each ovary is formed of 8 ovarian tubules, containing a chain of developing ova.
→ Oviducts of each ovary unite into a single median oviduct which opens into the genital chamber.
→ A pair of spermatheca is present in the 6th segment which opens into the genital chamber.
→Sperms are transferred through spermatophores.
→ Their fertilised eggs are encased oothecae.
→ Ootheca is dark reddish to blackish brown capsule, 8 mm long.
→ Females lay 9-10 oothecae, each contain 14-16 eggs.
→ Development of P. americana is paurometabolous.
→ Nymphs look like adults. They moult 13 times to reach the adult form.
→ The next to last nymphal stage has wing pads. Only adult cockroaches have wings.