Air sacs are thin-walled structures, one to two cell layers thick, that extend throughout the body cavity and into the wing and leg bones 2. Most birds have nine air sacs: two cervical ...

THIN-WALLED expansions of the tracheæ known as air sacs occur in those insects which have well-developed powers of flight. Misconception as to the function of these structures is common.

Air sacs, found in both extinct dinosaurs and modern birds, helped these creatures capture more oxygen and regulate body temperature. Their presence in sauropods played a critical role in enabling ...

Investigators are examining a bird strike among the potential causes leading to South Korea’s worst aviation disaster in history. Jeju Air flight 7C2216 crashed at Muan International Airport on ...

Investigators found bird feathers and blood in both engines of the Jeju Air jet that crashed in South Korea last month, killing 179 people, a person familiar with the probe said on Friday.