Elements of biology; a practical Elements of biology; a practical text-book correlating botany, zoology, and human physiology elementsofbiolog00hunt Year: [c1907] XXIX. THE BLOOD Function of the Blood. â We have seen in the preceding chapter that the chief function of the digestive tract is to change foods to such form that they can be absorbed through the walls of the food tube. The food, after it has passed through the intestine walls, ultimately reaches the blood and becomes, as we shall see, a part of this tissue. By means of a system of closed tubes, this fluid tissue circu- lates to all
Elements of biology; a practical Elements of biology; a practical text-book correlating botany, zoology, and human physiology elementsofbiolog00hunt Year: [c1907] XXIX. THE BLOOD Function of the Blood. â We have seen in the preceding chapter that the chief function of the digestive tract is to change foods to such form that they can be absorbed through the walls of the food tube. The food, after it has passed through the intestine walls, ultimately reaches the blood and becomes, as we shall see, a part of this tissue. By means of a system of closed tubes, this fluid tissue circu- lates to all parts of the body, depositing its burden of food at the places where it is most needed and where it will be used, either in the rejDair or building of tissues or in the release of energy. â >w.
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