Hadith 1

one so that his body would not need the separate places of food, and it would become soft, but rather the solidity of his body and collection its food, and it is the brain in its filling. The benefit of increasing the cavity is that it is lighter, and the benefit of unifying the cavity is that its body remains more solid, and the benefit of the solidity of its body is that it does not break during violent movements; and the benefit of the brain is that it nourishes it and keeps it moist at all times, so that it does not crumble with the drying of movement, and that it is hollow as solid. The cavity decreases if the need for strength is greater, and increases if the need for lightness is greater. Some of them created a screen for the aforementioned food, with an increase in need because of something that must pass through it, such as the smell inhaled with the air in the bones under the brain and the brain’s residue pushes into it. And the bones are all adjacent to each other, and there is not much distance between one of them and the one that follows it, but he did not make everything in the body of it one bone, so that the body would not include the lesion or fracture that afflicted it, and the parts of the body would have different, elaborate movements. For this reason, each one of them was prepared in the way that corresponds to what is wanted, and what it needed to move in some cases together and in some of them individually, with a ligament that grew from one end of the bone and connected to the other end, which is a white, insensitive body. So He-azwj Made one end of the two bones with appendages and in the other a bottom corresponding to the entry of these appendages and empowered these in them, and in this form between the bones, there were joints, and the ligaments became for the sake of the joints to move from them, some without the others. And for the sake of the continuity link between the bones that they move together as one bone, and because the bones and the rest of the organs do not have to move by themselves, but rather by a motor and by way of the direction of emotion, He-azwj Connected to them from the principle of sensation and movement and their source which is the brain, up to the point. And this access is the nerve, which is the substance of a sticky gum, a solid rectangle upon sensation, other than the hollow nerve that is in the eye. It’s benefit in particular is to benefit the brain through its middle to all the organs, sense and movement, and crosswise, the tightening of the flesh and the strengthening of the body. And it is not connected to the bone singly, but after it has been mixed with the flesh and ligaments, because if the nerves were connected individually to a great organ, they would either not be able to move it at all, or that its movement would be weak, especially when it is distributed, divided, and branched into the parts, and the portion of a single part becomes much more precise than the original and when it diverges from its origin and its premise. And for this reason, the nerve divides before it reaches the organ by which it is intended to move, and between those sections is woven into flesh and fragments of the ligament, so it is formed from all of that something called a muscle, and its bone, smallness and shape are as large as the organ that it wants to move and according to need to it, and place it in the direction to which it is intended to move that part. Then from the end that follows the moving part from the two ends of the muscle, something called a tendon grows, and it is a composite body from the nerve coming to that part and from the ligament that grows from the bones, and it has been rid of the meat and passes until it contacts the part which wants to move it with the lower end, so it heals with this measure, showing a little twitching of the muscle towards its origin by pulling the tendon with a st