Anatomy of the vein called the “gate”

We say that the end of the “gate,” which penetrates into the cavity of the liver, first divides into five parts and branches until it reaches the convex ends of the liver, one branch going to the gall bladder. These branches are like the roots of a growing tree, which go deep into the growing area.

As for the end of the second vein, adjacent to the concavity of the liver, this end, moving away from the liver, is divided into eight parts; two of them are small, and six are larger.

One of the small parts reaches the intestine itself, called the duodenum, to extract nutrients from it.

From this vein there are branches that diverge into an organ called the pancreas. The second part diverges in the lower parts of the stomach and near the pylorus, that is, the lower mouth of the stomach, to extract nutrients from it. And of the remaining six, one goes to the flat side of the stomach to nourish its outer surface, for the inner surface meets the first nutrients entering the stomach and feeds on them.

The second part goes towards the spleen to nourish the spleen.

Before this part reaches the spleen, a branch branches off from it, which feeds an organ called the pancreas with the purest nutrients from those that pass through this vein into the spleen. Then this part reaches the spleen, and when it reaches it, a decent branch separates from it and returns back, which divides on the left side of the stomach to nourish it. When the part that has passed into the spleen reaches its middle, then part of it rises up and part goes down. A branch extends from the ascending part to the upper half of the spleen to nourish it. The other part goes forward until it reaches the bulge of the stomach, and then divides into two parts; part diverges along the outer side of the left half of the stomach in order to nourish it, and part plunges deep into the mouth of the stomach in order to drive tart, sour excess black bile towards it, so that it comes out with other excesses and has an irritating effect on the mouth of the stomach, which stimulates the appetite . We've talked about this before.

As for the descending part, it is also divided into two parts. Part of it branches into the lower half of the spleen to nourish it, and the second part extends to the omentum and diverges in it to nourish it.

The third part of the first six goes to the left and diverges along the passages of the vessels surrounding the rectum in order to absorb the nutrients found in the feces.

The fourth part of the six is ​​divided like hairs.

Some of them are distributed along the outer side of the right convexity of the stomach, opposing the branch coming to the left lobe of the stomach from the side of the spleen, and part is directed to the right side of the omentum and diverges in it, opposing the branch going to the omentum to the left of the branching of the splenic vessel.

A fifth of those six diverge along the passages surrounding the colon colon in order to capture nutrients.

The sixth part is the same: a large proportion of it disperses around the jejunum, the rest - around the membranes of the small intestines adjacent to the “one-eyed” intestine, and extracts nutrients.