Mother: I was just about to tell you that part of the story. You have seen little creeks, and you know they flow into larger ones, which form small rivers, and they, in turn, flow in some broad river toward the sea. So this creamy fluid which is sucked up by the Villi goes into tiny veins; these open into larger ones, till all flow in one stream about as big as a slate-pencil up to a large vein near the neck, and from there to the heart, where the stream is changed to blood, and is ready for use in the body. Part of the food takes another way to get to the heart. It goes first to the liver, which takes the part it needs, and the rest goes on to the heart.
Helen: Then all we eat finally gets into the blood.
Mother: No; there is always some part that can not be used. Passing through the eating room the waste is carried into a garbage box, called the colon, which should be emptied every day.
Now let us see if we can give the names of the different rooms a slice of bread passes through before it reaches the heart and becomes blood.
Elmer: First, the passage, which is the mouth, down the steep stairs or gullet, through the stomach kitchen, through the serving room, the eating room, or small intestine, and from there straight to the heart, or else by another road through the liver to the same place.
Mother: Very good. Now what juices make the bread ready to become blood.
Percy: First, the saliva in the mouth.
Amy: And gastric juice in the stomach.
Helen: Then bile from the liver, and pan-cre-at´ic juice from the pancreas.
Elmer: The last was the in-tes´tin-al juice.