管状的

Fig.2—8 SEM observation of the isolated secondary wall from tracheary elements.

图2—8为扫描电镜下观察到管状分次生壁。

They creep along the seabed, their whiskery vibrissae probing the surface to feel for the tubes of buried mollusks.

牠们沿海底爬行，用胡般触须探测海床，搜寻埋在底下管状软动物。

Methods Incommodious bile duct was restored by making gallbladder one (lamella) with cystic artery into half-cannular or cannular gallbladder one (lamella).

方法利用带囊动脉囊瓣修制成半管状、管状囊瓣修复管狭窄。

In a pennaceous feather, the barbs grow helically around the tubular feather germ and fuse on one side to form the rachis.Simultaneously, new barb ridges form on the other side of the tube.

在正上，枝以螺旋形绕著管状生长，在管一侧接合在一起形成轴，同时在管另一侧形成新枝脊。