| 1. | Facial air sacs under their skin cushion the impact with the water.
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| 2. | Although birds have lungs they rely mostly on air sacs for ventilation.
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| 3. | They use these air sacs to migrate up and down in lakes.
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| 4. | Their skulls contain special air sacs that protect the brain from enormous pressure.
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| 5. | So far no evidence of air sacs has been found in ornithischian dinosaurs.
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| 6. | There are subcutaneous air sacs in the lower body and along the sides.
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| 7. | The pollen grains are round and do not possess wings or air sacs.
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| 8. | A pair of large resonating air sacs in the abdomen amplifies the sound.
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| 9. | Mites were recovered from the autosomal air sacs of bumble bees.
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| 10. | Sounds also bounce off the skull and air sacs that surround the melon.
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