Bile canaliculus is a thin tube that collects bile

Bile

Bile or gall is a bitter-tasting, dark green to yellowish brown fluid, produced by the liver of most vertebrates, that aids the process of digestion of lipids in the small intestine. In many species, bile is stored in the gallbladder and upon eating is discharged into the duodenum...

 secreted by hepatocytes. The bile canaliculi merge and form bile ductules, which eventually become common hepatic duct

Common hepatic duct

The common hepatic duct is the duct formed by the convergence of the right hepatic duct and the left hepatic duct . The common hepatic duct then joins the cystic duct coming from the gallbladder to form the common bile duct...

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Hepatocytes are polyhedral in shape, therefore having no set shape or design. They have surfaces facing the sinusoids

Liver sinusoid

A liver sinusoid is a type of sinusoidal blood vessel that serves as a location for the oxygen-rich blood from the hepatic artery and the nutrient-rich blood from the portal vein....

, (called sinusoidal faces) and surfaces which contact other hepatocytes, (called lateral faces). Bile canaliculi are formed by grooves on some of the lateral faces of these hepatocytes.

Microvilli are present in the canaliculi but are sparse.