How do turtles breathe if their shells are so rigid?
Quick Answer
Turtles do not breathe through their shells. They use muscles and movements inside the body to expand and contract the lungs, and some species can also absorb a small amount of oxygen through the throat or cloaca.
The Full Story
A turtle’s shell protects vital organs, but it does not function as a lung. Because the shell is rigid, turtles rely on specialized muscles and movements of the limbs, neck, and internal body wall to change chest volume and move air in and out of the lungs. Aquatic species such as some freshwater turtles can also take in limited oxygen through surfaces in the throat or cloaca, especially while resting underwater. This extra route helps them survive long periods without surfacing.
Key Facts
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