Question : Comment on the role of air sacs in increasing the respiratory efficiency in birds.

Question : Comment on the role of air sacs in increasing the respirato

1.	Question : Comment on the role of air sacs in increasing the respiratory efficiency in birds.
Answer» Solution :1. The respiratory ORGANS are the lungs and air sacs. The LARYNX opens into the trachea and is supported by a series of closely set rings. 2. The trachea divides into two bronchi, each of which divides and sub-divides into smaller branches, ultimately ENDING in CAPILLARIES which lies intermingled with the capillaries of the pulmonary vessels. 3. Lungs are solid spongy organs, attached dorsally to the ribs. 4. There are nine air-sacs: a pair of cervical sacs at the base of the neck one on each side, a single median interclavicular air sac connected with both lungs and situated in between the two limbs of the furcula and on either sides it gives off an extraclavicular air sac communicating with an air - cavity of the HUMERUS and a clavicular air sac, two pairs of thoracic air sacs and a pair of abdominal air sacs. 5. This complicated arrangement adds to the efficient respiratory function and maintenance of a high temperature.