Research Article

Three-Dimensional Structure and Disposition of the Air Conducting and Gas Exchange Conduits of the Avian Lung: The Domestic Duck (Cairina moschata)

Table 2

Numbers of the various categories of secondary bronchi in the duck lung.

No.MVLDLV PO
LRLRLRLR

144710224440
24578223940
3441010444238
45568344037
54488423836
65588424442

Mean
Range 4-54-56–108–102–42–438–4436–42

Explanations for abbreviations are as follows: LV: lateroventral; MV: medioventral; LD: laterodorsal; PO: posterior; R: right lung; L: left lung.