Squids and other mollusks have a complex digestive system. In their mouth, there is a rough tongue called the radula that many mollusks possess, as well as a horny beak composed of chitin. This beak can shred their prey into manageable pieces to aid in the digestive process. Digestive organs can be found in the visceral mass. Food that they ingest is processed in the stomach, which is part of their digestive system. It then goes to their caecum where further digestion takes place. Food then travels to their liver for further processing and absorption so that their cells will be able to use the nutrients. At the end of this digestive tract is a rectum. Here, the foods that they were unable to digest, become the solid waste which is then egested from the body.
The squid is a head-footed mollusk which means they have a definite head surrounded by tentacles. A mollusk has tubes which are called siphons. The food is brought in through the siphons and then to the mouth. The food then goes to the digestive gland and intestine. The waste that is left then leaves the squid via the anus through an organ called the nephridium.