A gland is an organ or specialized group of cells that secrete particular chemical substances such as hormones, digestive juices etc.
The liver is the largest digestive gland located just behind the diaphragm on the right side of the upper abdominal cavity.
The liver secretes a digestive juice that is greenish-yellow in colour and is known as bile juice. The main function of bile juice is to break down complex fat molecules into tiny droplets for easy digestion and this process is also known as emulsification of fat.
Final answer: The liver is the largest gland in the body.