Complex sentence: In humans it can be voluntary or involuntary, the latter being due to a small number of disorders.Muntah of a person's meals following their ingestion is known as rumination syndrome, a rarely diagnosed eating disorder.
Split into simpler sentences: In humans it can be voluntary or involuntary, the latter being due to a small number of disorders. Regurgitation of a person's meals following their ingestion is known as rumination syndrome, a rarely diagnosed eating disorder.