1. INSECT
DEVELOPMENT

2. Structure of Egg polar granules micropyle yolk spheres
nuclear cytoplasm
aeropyle
chorion
nucleus
periplasm (cytoplasm)
polar granules
vitelline membrane

3. aeropyles
micropyle

4. Sperm Transfer
1. Spermatophore

5. Sperm Transfer
2. Direct intromission

6. Sperm Transfer
2. Direct intromission
Penes of male
Argia (Odonata)

7. Sperm Transfer
3. Traumatic (Haemocoelic) insemination

8. Development - Fertilization
Syncytial blastoderm
germ cells

9. Development - Germ Band Formation
Blastoderm cells
migrate ventrally
Germ band

10. Insect Development - Gastrulation1
ectoderm
mesoderm 2 3
germ band

11. Amnionic sac
Midgut rudiments 2 1
dorsal closure
neuroblasts 3 4

12. Heart
endoderm
Ectoderm
mesoderm
Gut
fat body
Hemocoel
tracheal invagination
somatic muscles
Ventral nerve cord

14. Fate of the Germ Layers cleavage energids blastoderm pole cells
ectoderm
mesoderm
endoderm
midgut
stomodeum
proctodeum
epidermis
trachea
salivary glands
mesodermal bands
neuroblasts CNS
gametes
gonad
visceral muscles
somatic muscles
fat body
heart