Ch IV
RESORPTION OF THE FORMED ELEMENTS 67 Digestion in the tissues.—Resorption of cells in the Invertebrata.—Resorption of red corpuscles by the phagocytes of the Vertebrata.—Phagocytes.—Various categories of these cells.—Macrophages and microphages.—Part played by macrophages in the resorption of the formed elements.—Digestive property of the macrophagic organs.—Solution of the red blood corpuscles by the blood serums.—The two substances which operate in haemolysis.—Macrocytase and fixative.—Analogy of the latter with enterokynase.—Escape of the macrocytase during phagolysis.—Suppression of phagolysis.—Resorption of the spermatozoa.—Presence of fixatives in plasmas.—Origin of fixatives.