It appears that dinosaurs (or some dinosaurs) may have had air sacs in their bones, allowing them to circulate the air they breathed into their bones and then back into their lungs again, giving them an extra-efficient breathing system and allowing them to sustain the hot-blooded metabolism that many scientists now think they had.
Turns out, while dinos may have invented this system of utilizing air, they aren’t the only creatures that are known to use it.
Another, very common kind of critter also uses it . . . birds.
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Author: Jimmy Akin
Jimmy was born in Texas, grew up nominally Protestant, but at age 20 experienced a profound conversion to Christ. Planning on becoming a Protestant seminary professor, he started an intensive study of the Bible. But the more he immersed himself in Scripture the more he found to support the Catholic faith, and in 1992 he entered the Catholic Church. His conversion story, "A Triumph and a Tragedy," is published in Surprised by Truth. Besides being an author, Jimmy is the Senior Apologist at Catholic Answers, a contributing editor to Catholic Answers Magazine, and a weekly guest on "Catholic Answers Live."
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Sounds much more efficient than these book lungs I have.
What?
“Turns out, while dinos may have invented this system of utilizing air…”
How clever of them!
Weird.. this was one of the topics in bio class today: avian respiration.
Dinoaves, what can I say, this has been known for some time now.