If the tubule be small and have its usual lining of epithelium, the cast will be narrow; if it be large or entirely denuded of epithelium, the cast will be broad.
A cast, therefore, indicates the condition of the tubule in which it is formed.
Albuminous material, the source and nature of which are not definitely known, probably enters the lumen of a uriniferous tubule in a fluid or plastic state.
The wall of the tubule is solid, not latticed as in the following genus.
Inner and outer aperture of thetubule of the same size; their diameter equal to their length and distance.
Cephalis flat, cap-shaped, with three or four transverse rows of small pores, and a cylindrical, obliquetubule of twice the length.
Cephalis subspherical with an oblique cylindrical tubule of twice the length, and with few small pores.
Cephalis subspherical, with an oblique cylindrical tubule of the same length, and numerous small pores.
Tubule of the cephalis short and wide, truncate, conical.
A fine axial canal or central tubule is usually visible in the axis of each rod, and often this axial canal is studded with numerous short lateral branches (Pl.
Cephalis hemispherical, with an oblique, cylindrical tubuleof twice the length (in the figure the greater part is broken away).
The left region is labeled "gastric pit," and the right region, "Tubule of gland.
Gegenbaur, in his picture, draws a straight tubule passing from every goblet among the fine canaliculi of the chitin.
The fine tubule is soon lost in the thickened but soft modification of the chitinous layer (ch.
In exact correspondence with this transformation of a nephric tubule into a ductless gland of the nature of a lymphatic gland, is the formation of the head-kidney in the Teleostea.
The tubule from the larger goblets is most conspicuous, and is in my sections always tortuous, never straight, as represented by Gegenbaur.
Also, just as in the Polychaeta, the ciliated nephric tubule has no internal funnel-shaped opening into the coelom, but terminates in these groups of solenocytes.
This terminal swelling is filled with a homogeneous refringent mass staining blue with methylene blue, in which I have seen no trace of a nucleus; through this the chitinous tubule makes its way without any sign of bulging on its part.
Each goblet possesses a central pore, which is the termination of a very fine, very tortuous, very brittle chitinous tubule (ch.
All these sense-organs are formed on the same plan, in that they possess a fine chitinous tubule passing through the layers of chitin into the underlying hypodermal and nervous tissues, which terminates on the surface in a pore.
We may next consider tubes of intermediate fineness, say a tracheal tubule of the Cockroach at the point where the spiral thread ceases, and where the exchange of gases through the wall of the tubule becomes comparatively unobstructed.
Suppose the difference of pressure at the two ends of the tubule to be one-hundredth of an atmosphere, and further, that the tubule is a quarter of an inch long and ·0001 in.
The tubule would then be cleared out every four seconds.
As a rule, if they appear at this stage, the tubule connecting them with the parent zooecium is short or obsolete; sometimes they are produced only on one side of the zooecium, sometimes on two.
The former genus possesses an upright orificial tubule and has zooecia separated by basal tubules.
The zooecia when young are practically recumbent, each being of an ovoid form and having a stout, distinctly quadrate orificial tubule projecting upwards and slightly forwards near the anterior margin of the dorsal surface.
A single aperture surrounded by a crater-like depression in the cellular coat and provided with a foraminal tubule resembling an inverted bottle in shape.
Distal portion of malpighian tubule of Bolitophila, showing modification to form photogenic organ (after Wheeler and Williams).
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "tubule" in a variety of sentences. We hope that you will now be able to make sentences using this word.
