tubulus

tubulus /tu·bu·lus/ (too´bu-lus) pl. tu´buli   [L.] tubule; a minute canal.

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tubule [too´būl]

a small tube; especially, a minute canal found in various structures or organs of the body. adj., adj tu´bular.

collecting t's the terminal channels of the nephrons, which open on the summits of the renal pyramids in the renal papillae.

convoluted t's channels that follow a tortuous course; there are convoluted renal tubules and convoluted seminiferous tubules.

dentinal t's the tubular structures of the teeth.

galactophorous t's small channels for the passage of milk from the secreting cells in the mammary gland.

Henle's t's the straight ascending and descending portions of a renal tubule forming Henle's loop.

lactiferous t's galactophorous tubules.

mesonephric t's the tubules comprising the mesonephros, or temporary kidney, of amniotes.

metanephric t's the tubules comprising the permanent kidney of amniotes.

renal tubule the minute canals composing the substance of the kidney and secreting, collecting and conducting the urine; in the glomerulus they have a basement membrane and epithelial lining.

seminiferous t's the tubules of the testis, in which spermatozoa develop and through which they leave the gland.

uriniferous t's renal tubules; channels for the passage of urine.

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tubulus

pl. tubuli [L.] tubule.