Insect anatomy scheme
A- Head // B- Thorax // C- Abdomen
1 antenna - 2 ocelli (lower) - 3 ocelli (upper) - 4 compound eye - 5 brain (cerebral ganglia) - 6 prothorax - 7 dorsal artery - 8 tracheal tubes (trunk with spiracle) - 9 mesothorax - 10 metathorax - 11 first wing - 12 second wing - 13 mid-gut (stomach)  - 14 heart - 15 ovary - 16 hind-gut (intestine, rectum & anus) - 17 anus - 18 vagina - 19 nerve chord (abdominal ganglia) - 20 Malpighian tubes - 21 pillow - 22 claws - 23 tarsus - 24 tibia - 25 femur - 26 trochanter - 27 fore-gut (crop, gizzard) - 28 thoracic ganglion - 29 coxa - 30 salivary gland - 31 subesophageal ganglion - 32 mouthparts
Source: Wikimedia Commons (File:Robal.png by Piotr Jaworski, PioM)

Insect anatomy scheme

A- Head // B- Thorax // C- Abdomen

1 antenna - 2 ocelli (lower) - 3 ocelli (upper) - 4 compound eye - 5 brain (cerebral ganglia) - 6 prothorax - 7 dorsal artery - 8 tracheal tubes (trunk with spiracle) - 9 mesothorax - 10 metathorax - 11 first wing - 12 second wing - 13 mid-gut (stomach)  - 14 heart - 15 ovary - 16 hind-gut (intestine, rectum & anus) - 17 anus - 18 vagina - 19 nerve chord (abdominal ganglia) - 20 Malpighian tubes - 21 pillow - 22 claws - 23 tarsus - 24 tibia - 25 femur - 26 trochanter - 27 fore-gut (crop, gizzard) - 28 thoracic ganglion - 29 coxa - 30 salivary gland - 31 subesophageal ganglion - 32 mouthparts

Source: Wikimedia Commons (File:Robal.png by Piotr Jaworski, PioM)