Cockroach
Chapter Name : Structural Organization In Animals |
Sub Topic Code : 103_11_07_04_06 |
Topic Name : Cockroach |
|
Sub Topic Name : Reproductive System-Female |
|
Introduction
The female reproductive system consists of two large ovaries.
Pre-Requisites:
To understand how female reproductive system of cockroach functions.
Activity:
Videos, which show how fertilization and development of cockroach takes place.
Real Life Question:
Is fertilization internal in cockroach?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Ovary | Each ovary is formed of a group of eight ovarian tubules or ovarioles, containing a chain of developing ova. |
| Oviducts | each ovary unite into a single median oviduct (also called vagina) which opens into the genital chamber. |
| Fertilization | Sperms are transferred through spermatophores. Their fertilised eggs are encased in capsules called oothecae. |
| Development | On an average, females produce 9-10 oothecae, each containing 14-16 eggs. The development of P. americana is paurometabolous, meaning there is development through nymphal. stage. The nymphs look very much like adults. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|
Practical examples around us
| Examples | Explainations |
|---|---|
| Oothecae | It is found at some places in the house. |
What you learn in Theory:
The different parts of female reproductive system and how development of cockroach takes place.