he said the spleen is elongated and lingual. the reason for its creation being elongated is that it extends along some of the length of the stomach so that what is ejected from it of the black bile can easily flow into it. it was not created round so that its mass would not increase. reducing its mass is better. therefore if it becomes fat the body will be harmed and thin. it was not created encompassing the stomach as is the case with the liver so that it would not come into contact with it frequently and spoil its digestion due to the poor quality of its temperament. and allah is the grantor of success.
قوله والطحال مستطيل لساني. السبب في خلقه مستطيلا أن يكون ممتدا في بعض طول المعدة حتى يسهل اندفاع ما يندفع منه من السوداء إليها ولم يخلق مستديرا لئلا يكثر جرمه. فإن تقليل جرمه أولى. ولذلك إذا سمن تضرر البدن ونحف. وإنما لم يخلق مشتملا على المعدة كما في الكبد لئلا تكثر ملاقاته لها فيفسد هضمها برداءة مزاجه. والله ولي التوفيق.