They may make your skin crawl and you might wish to think of them as a lower life form, but insects have a remarkably elegant and simple way of delivering oxygen to their body and removing the carbon dioxide waste. Insects have a tracheal system rather than the complex respiratory (lungs and stuff) and circulatory…
Insect respiratory system
What conditions on earth caused creatures to be so large in the
Would prehistoric spiders have been much larger than the spiders
Ticklinks
Why were insects so big millions of years ago? - Quora
How did dinosaurs evolve to become so large when other animals of
Insect respiratory system
Respiratory System in Vertebrate Animals
Has anyone tried raising animals in high-oxygen environments
Do all the land animals have one common ancestor that lived in
Animal Respiration: Tracheal System
