Hadith 1

eat and fat, for they are formed from blood. The second chapter – regarding the anatomy of the head and it’s parts, and what is inclusive upon it
Including the cranium of the head, which is what Allah-azwj Created to preserve the brain and protect it from pests, so Allah-azwj Created it round to length, because roundness is the greatest area of straight lines, if its circumference is equal, and so that he does not get excited about clashes, what those with angles do not get excited about. As for its length, it is because the nerve roots of the brain are placed in length so as not to be crowded and not compressed, and the front or back protrusion may be lost, or both. The cranium is composed of six bones, two of them as the ceiling and four as the walls, and they are connected to each other by seams called ‘Al Shoun’ (partitions), and the walls are made harder than the fontanelle because the falls and bumps on them are more, and because the need to loosen the fontanelle in order to allow the decomposing vapour to penetrate and not to weigh on the brain. And He-azwj Made the most solid walls at its back because it is absent from guarding the senses. And in the cranium there are many holes, from which many nerves come out, and veins and arteries enter into them, and from them come out thick vapours that do not penetrate into the bone. It extracts the marrow and connects to the cranium, the upper jaw, which in it there are the cheeks, the ears, and the upper teeth. It is composed of fourteen bones connected to each other by sutures. Then the lower jaw. It is the one that has the lower teeth, except that it is not connected by fusion and focus, but rather a detailed connection due to the need for movement, and the place where it is connected to it is called zirphin, and it is a compound other than the teeth from two bones between them in the middle of the chin. And under the cranium, on the back side, between it and the upper beard, is a concentric bone that has been filled with the defect that occurred from the division of the shapes of these bones, and it is called the peg. All the bones of the head if you count as they should be, except for the teeth, are twenty-three bones. As for the brain, Allah-azwj Glorious Created it soft and creamy so that the senses could be easily imprinted in it, so that the nerves that sprang from it would be firm that would neither be broken or cut off, and Made its mood cool and moist so that the forces deposited in it would be stirred from their perceptions, and lest it be ignited by the heat generated in it by intellectual and imaginative movements, and to modify the strength of the soul and the heat that rises to it from the heart, and to make its front, which is the source of the sensory nerves, softer than its back, which is the source of the motor nerves, because movement does not occur except by force, but rather it occurs with hardness. And it is divided into two parts, length and width, so that the lesion does not include all its parts. It is the locus of the psychic soul and the loci of the senses, and the front of it is the greatest, and it progresses to insignificance until it returns to the size and shape of the marrow. It has two appendages, similar to the nipples, reaching to the large, draining-like bone in its place in the cranium, where the end of the nose ends, in which the sense of smell, and with them the residue rushes from this interior to the mentioned bone and descends from it to the branchia with sneezing. As for the residue of the other interiors, it rushes to the perforated bone that is under the palate, and the front interior is the place where the air is attracted to the brain, and the air, after its stay in the bellies and its change to the place of the brain, becomes a psychological spirit and often exceeds what the bellies can accommodate, so it ascends to the interior of the brain called ‘Al-Tazra