This seems like a simple question, why do bugs die when smashed, but I have been thinking for a while and searching no no avail.
When a person’s head is cut off they die because the lack of oxygen through blood to the brain and severing of the central nervous system causes them to loose consciousness indefinitely. When a person drowns in water it is because a lack of oxygen circulating. When an insect; say an ant or fly is drowned it is because their tracheae are filled with water and all gaseous oxygen is used up.
However when you crush an insect such as a fly it has no blood crying oxygen. When flies or other bugs are crushed they ooze out Hemolymph which is a fluid they use to transport nutrients, but if their cells can store nutrients why would they die instantly.
I have also heard that the stomodaeal nervous system is what maintains most of their body functions, but even without those body functions wouldn’t the cells continue to live? Also if the brain were crushed and the nervous system was still intact would they be fine?
I apologize if I worded that in a confusing way, or if I’m just not seeing the forest through the trees, but if anyone could clear this up for me it would be greatly appreciated!