(anatomy) any hollow cylindrical body structure

（解剖学）中空の円筒状の身体構造

one of the tubules forming the respiratory system of most insects and many arachnids

ほとんどの昆虫と多くのクモ類の呼吸器系を形成する細管の一つ

any of the small tubules that are the excretory units of the vertebrate kidney

脊椎動物の腎臓の排泄単位となる小さな管のいずれか

a microscopically small tubule

顕微鏡でしか見えないほど小さい細管

a tubule that drains excess aqueous humor

過剰な房水を排出する管

the several highly convoluted tubules that lead from the rete testis to the vas deferens and form the head of the epididymis

精細管から精管へとつながり、精巣上体頭部を形成する複数の非常に巻き込まれた細い管