Lungs key:

 tr: trachea - windpipe
  (Continues downward into the bronchi, which branch left and right.)

 pd: Pulmo dexter - right lung
  (Named by the model's orientation - viewer-facing - so sides appear reversed.)

 ps: Pulmo sinister - left lung

 ls: Lobus superior - superior lobe
  (Lobes are separated by groove-like fissures; enhanced tactile contrast.)

 lm: Lobus medius - middle lobe
  (Present only in the right lung.)

 li: Lobus inferior - inferior lobe
  (The left lung lacks a middle lobe; the right lung's middle lobe is shifted lower.)

 tp: arteriae pulmonales - pulmonary arteries
  (Technically aa. pulmonales for "arteries"; commonly shown in blue.
  Alternate singular: arteria pulmonalis, used after the trunk divides into right and left branches.)

 vp: venae pulmonales - pulmonary veins
  (Technically vv. pulmonales for "veins"; commonly shown in red, as they carry oxygenated blood.)

 td: truncus pulmonalis - pulmonary trunk
  (Large artery before it splits into right and left pulmonary arteries.)