he said and behind it is the backbone with a striking vein extending over it. he mentioned first what warms the stomach from its side and from its front and what is mentioned of it here is what warms it from behind it and the backbone is made of bones and it is cold so there is nothing in it that warms the stomach except what is upon it of the mentioned veins so those veins are what warms it from behind it not the backbone itself.
قوله ومن خلفها الصلب ممتدا عليه عرق ضارب، وقد ذكر أو لا ما يدفئ المعدة من جانبها ومن قدامها والمذكور منها ها هنا هو ما يدفئها من ورائها والصلب من عظام وهي باردة فليس فيه أدفأ للمعدة إلا بما عليه من العروق المذكورة فتكون تلك العروق هي المدفئة من ورائها لا الصلب نفسه.