A muscular organ found in the digestive tract of poultry, used to grind feed with ingested grit, in order to aid digestion.


A mycotoxin produced by moulds such as Aspergillus fumigatus. It causes cell death and is a strong immunosuppressant when ingested by animals. If an animal is exposed to the mycotoxin for a long period of time, its toxicity will be accelerated. Cattle with mastitis that are unable to be treated may be the due to ingestion of gliotoxin.


A young pig being fattened for slaughter.

Gut lumen

The tubular part of the digestive tract that holds the partially digested contents and where breakdown takes place.