. A manual of zoology. Zoology. ^'' -'^-"^'y^ glutin, so iutimiitely coinbinod with inorganic constituents tliat it appears nnder the microseoiJe as a homogeneous mass. The propor- tion of organic and inorganic sub- stances varies according to the age and sp)ecies of animal: in man, for example, there is 05^ inorganic to 35^ organic suljstanee; in the turtle, Gofo to 37^. Of the in- organic constituents, the most im- portant is calcic phosphate, 84^; in smaller quantities, combinations of fluoric, chloric, carbonic acids i^, , ^ ^-,-t ^^^%,^^^^ j,-)- and magnesia. Morphologically f J^^^/%
. A manual of zoology. Zoology. ^'' -'^-"^'y^ glutin, so iutimiitely coinbinod with inorganic constituents tliat it appears nnder the microseoiJe as a homogeneous mass. The propor- tion of organic and inorganic sub- stances varies according to the age and sp)ecies of animal: in man, for example, there is 05^ inorganic to 35^ organic suljstanee; in the turtle, Gofo to 37^. Of the in- organic constituents, the most im- portant is calcic phosphate, 84^; in smaller quantities, combinations of fluoric, chloric, carbonic acids i^, , ^ ^-,-t ^^^%,^^^^ j,-)- and magnesia. Morphologically f J^^^/%:'''K'''^r''^:^'l V^ the matrix is composed of the bone ^ •' '^ — ' ^'^ -^ ''i. The former are arranged jjarallel to the sur- face of the iieriosteum ami of the marrow-cavity and form a mantle of concentric layers around the marrow-cavity. Inti^i this groundwork the Haversian canals with their lamel]a3 enter, destroying and suiierseding the fundamental lamella; coming in their way. 'i'he Haversian lan^ellaj are concentrically arranged around the lumen of the Haversian canals just as tlie fundainental lamello3 are around the Fig. i4. — Cro^s-section 1hr<tui^li tlie liuman metacai'ijus. ( a, surface of the periosteum; h, surface of the marrow-cavity; c, cross-sec- tions of the Haversian canals and their system of lamellae; d, funda- mental himeUte; f, bone Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Hertwig, Richard, 1850-1937; Kingsley, J. S. (John Sterling), 1854-1929. New York, H. Holt and Company
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectzoology, bookyear1902
