1)愛媛県西条中央保健所(〒793-0042 西条市喜多川796-1) 2)山口大学農学部(〒753-8515 山口市吉田1677-1) |
(1998年9月28日受付・1998年10月15日受理)
6カ月齢の豚48例について気管の全長,気管の気管支の分岐位置および気管軟骨の総数と形態について調査した.気管の全長は158〜212mm(平均値187.8±14.9mm)で,気管軟骨総数は29〜40個(平均値34.6±2.3個)であった.気管の気管支の分岐位置はほぼ一定で,気管前端から約5分の4の位置であった.ほとんどの例で隣接気管軟骨の癒合と軟骨の形態不全が頻繁に認められ,気管分岐部付近では背側の内面に軟骨小片が認められる例が多かった.また,大多数の例で第1気管軟骨の遊離縁が2〜4枝に分枝していた. --------------------日獣会誌 52,256〜259(1999)
Morphologic Characteristics of Swine Tracheal CartilagesShozo MOCHIZUKI* and Takashi MAKITA
SUMMARY The length of the trachea, the level of tracheal bronchus, and the number and shape of tracheal cartilage
rings were studied in 48 6-month-old pigs. The total length of the trachea and the number of cartilage
rings ranged from 158 to 212 mm (187.8±14.9 mm on average), and from 29 to 40 (34.6±2.3 on average),
respectively. The tracheal bronchus diverged at a position corresponding to about 80% of the total number
of tracheal cartilages. The first cartilage ring was peculiar and variable in shape, and fused or incomplete
tracheal rings were recognized in most cases. Some cases had additional small cartilage attached to the
inner dorsal surface of the caudal tracheal rings. --------------------J. Jpn. Vet. Med. Assoc., 52, 256〜259(1999) |