"God hath made of one blood all nations of men for to dwell on all the face of the earth."—Acts xvii.


884. Why does the milky, or nutritious matter, separate from the innutritious, upon admixture with bile?

Because the bile contains an oily matter which repels the watery milk of nutrition.

The pancreatic juice also enters through the same duct with the bile. But its precise use is not understood. It is a fluid much like the salivary secretion of the glands of the mouth.

Fig. 50.—GREAT VESSELS OF THE CIRCULATION, AND THE DUCT WHICH CONVEYS NUTRITIVE MATTER TO THE BLOOD.

A B. Jugular veins which return blood from the head to the heart.