1. INSECT REPRODUCTIVE SYSTEM

2. Reproductive system (1) of mixed embryonic origin - ecto- & mesoderm
(2) only functional in adult
(3) not required for survival of individual
(4) contributes directly to next generation

3. Insect Reproductive System
gonad
Primary exit system
Mesodermal
Secondary exit system
Ectodermal
gonopore

4. Female Reproductive System
ovary
ovariole
calyx
lateral oviduct
common oviduct
spermathecal gland
spermatheca
accessory gland
vagina

5. Ovarioles
terminal filament
Germarium (2N)
Vitellarium (N)

6. Types of Ovarioles 1. Dieroistic common sac primary oocyte
Panoistic
Meroistic
a. Polytrophic
Telotrophic
(Acrotrophic)
Types of Ovarioles
1. Dieroistic
common sac
primary oocyte
follicle cells
Lateral oviduct

7. Types of Ovarioles 2. Panoistic primary oocyte peritoneal sheath
Dieroistic
Panoistic
Meroistic
a. Polytrophic
Telotrophic
(Acrotrophic)
Types of Ovarioles
2. Panoistic
primary oocyte
peritoneal sheath
germinal vesicle
(nucleus)
follicle cells

8. Types of Ovarioles 2. Meroistic a. Polytrophic primary oocyte
Dieroistic
Panoistic
Meroistic
a. Polytrophic
Telotrophic
(Acrotrophic)
Types of Ovarioles
2. Meroistic
a. Polytrophic
primary oocyte
nurse cells
peritoneal sheath
germinal vesicle
(nucleus)
follicle cells

9. Types of Ovarioles 2. Meroistic a. Polytrophic Ovarioles Dieroistic
Panoistic
Meroistic
a. Polytrophic
Telotrophic
(Acrotrophic)
Types of Ovarioles
2. Meroistic
a. Polytrophic

10. Types of Ovarioles 2. Meroistic b. Telotrophic nurse cells
Dieroistic
Panoistic
Meroistic
a. Polytrophic
b. Telotrophic
(Acrotrophic)
Types of Ovarioles
2. Meroistic
b. Telotrophic
nurse cells
trophic cord
primary oocyte
peritoneal sheath
germinal vesicle
(nucleus)
follicle cells

11. Male Reproductive System
testis
follicle
seminal vesicle
vas deferens
accessory gland
Ejaculatory duct

12. Male Reproductive System
apical cell 2N
Germarium
Zone of Growth N
Zone of Maturation
Zone of Transformation

13. Accessory gland products - Spermatophore

14. Gametogenesis
Gametogenesis - all gametogenesis follows the same general sequence
Germ cell 2N
Mitosis to produce more germ cells
Onset of meiosis I
Primary gametocyte
(meiosis I prophase) 2N
Complete meiosis I N N
Secondary gametocyte
Meiosis II
Gamete N N N N

15. Spermatogenesis Spermatogonium Mitosis to produce more germ cells
Onset of meiosis I
Primary spermatocyte
(meiosis I prophase) 2N
Complete meiosis I N N
Secondary spermatocyte
Meiosis II N N N N
Early spermatids
Differentiation
Spermatozoa

16. Spermatogenesis Germarium Zone of Growth Zone of Maturation
Zone of Transformation N N N N

18. Structure of Sperm – Mammalian model
nucleus
actin
mitochondria
acrosome
tail

19. Sperm types
Apyrene
Eupyrene

20. Sperm types

21. Oogenesis Ovum Oogonium Mitosis to produce more germ cells
Onset of meiosis I
Primary oocyte
(meiosis I prophase - arrested - present at birth) 2N
Complete meiosis I
First polar body N
Secondary oocyte
(arrested at metaphase of meiosis II)
Ovulation
Ovum
Second polar body N

22. Structure of ovariole
Germarium (2N)
Vitellogenesis
Vitellarium (N)
Choriogenesis