Bile juice is secreted by _________.

Answer: In humans, bile juice is secreted by the liver within humans. The explanation for this has been provided in the following.

Gall or Bile is essentially a digestive fluid produced from the liver of most vertebrates including humans. It is dark green to yellowish-brown in color. In humans, bile juice is produced from the liver and concentrated or stored within the Gall’s bladder. After food has been consumed by the individual, this bile is secreted into the duodenum. Thus bile juice is essentially digestive fluid produced by the human liver. Its core function is the conversion of fats in foods in the form of fatty acids that are in turn absorbed in the gut. Bile is important for the total digestion of different types of fats. It also helps in digesting carbohydrates and proteins to some extent. This occurs due to the presence of bile salts which happens in some particular ways.  These have been outlined in the following. 

At the time of fat digestion, bile functions in the form of emulsifiers to break large globules of fat into smaller droplets of emulsions. Fats that are emulsified, provide a larger surface area for the actions of fat-digesting enzymes for making the process fast.  Bile further acts as a suitable solvent. As a result of this property, it functions as a suitable medium for the interaction between fat-splitting enzymes as well as fats. As mentioned earlier Bile also helps in the absorption of a different substance.