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Where does the trachea divide into the two main bronchi?

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Illustration showing different animals and their respiratory organs: a spider with book lungs, a chicken with lungs, a sponge with labeled inflow and outflow pores, a fish with gills, and a caterpillar with spiracles. — Respiratory system Different methods of respiration in animals.

The trachea divides into the two main bronchi at its lower end, forming an inverted Y shape. Each of these branches leads into one of the two lungs.12