air sac









air sac


noun

  1. a sac containing air.
  2. alveolus(def 2).
  3. any of certain cavities in a bird’s body connected with the lungs.
  4. a saclike dilation of the wall of a trachea in many insects.

noun

  1. any of the membranous air-filled extensions of the lungs of birds, which increase the efficiency of gaseous exchange in the lungs
  2. any of the thin-walled extensions of the tracheae of insects having a similar function

n.

  1. A tiny, thin-walled, capillary-rich sac in the lungs where the exchange of oxygen and carbon dioxide takes place.alveolar sac

  1. An air-filled space in the body of a bird that forms a connection between the lungs and bone cavities and aids in breathing and temperature regulation.
  2. See alveolus.
  3. A saclike enlargement in the trachea of an insect.
  4. A baglike piece of skin or tissue below the jaw of certain animals, such as the bullfrog and orangutan, that can be inflated to increase sound production.

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