Definition of respiratory tree in English:

respiratory tree

noun

Zoology Anatomy
  • 1(In sea cucumbers) either of two thin-walled, highly branched organs that draw in oxygenated sea water from the cloaca and extend into the fluid-filled body cavity.

  • 2A branching system of respiratory passages, as the trachea, bronchi, and bronchioles of the vertebrate lung.

Origin

Mid 19th century ; earliest use found in Edward Griffith (1790–1858), naturalist. After French arbre respiratoire.