. Principles of veterinary science; a text-book for use in agricultural schools. Veterinary medicine. CHABACTEKISTICS OF ANIMALS 31 inorganic matter, but differs from them in containing more of the mineral elements. The organic matter constitutes about one-third the total amount in mature bones, and when freed from the inorganic substances is known as ossein, a form of gelatin. This may be demonstrated by soaking a fresh bone in weak hydrochloric acid to dissolve out the inorganic matter (decalcification). All hard- ening constituents are lost and while the original shape of the bone is retain
. Principles of veterinary science; a text-book for use in agricultural schools. Veterinary medicine. CHABACTEKISTICS OF ANIMALS 31 inorganic matter, but differs from them in containing more of the mineral elements. The organic matter constitutes about one-third the total amount in mature bones, and when freed from the inorganic substances is known as ossein, a form of gelatin. This may be demonstrated by soaking a fresh bone in weak hydrochloric acid to dissolve out the inorganic matter (decalcification). All hard- ening constituents are lost and while the original shape of the bone is retained, the mass is soft and flexible like India rubber. The organic matter gives bone its elasticity and tenacity. The in- organic or mineral matter con- stitutes the other two-thirds and is in the form of: Calcium Calcium Magnesium phosphate Sodium salts per cent per cent per cent per cent The inorganic matter renders bone hard and dense. This com- bination of animal and mineral substances gives solidity to the bones, yet elasticity enough to prevent fracture under ordinary circumstances. It is very difficult to break a green bone on this account. On sectioning a bone there are revealed two varieties of bone texture: the outer or compact tissue, and the inner, cancellated or spongy tissue (Fig. 3).. Fig. 3.—Sagittal section of right large metatarsal bone of horae: , Compact substance; , spongy substance; Cm., medul- lary cavity; , nutrient fora- men. Note the greater thick- ness of the compact substance of the anterior part of the shaft. (Sisson, Anatomy of Domestio Animals.) Digitized by Microsoft®. 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 Hadley, Frederick Brown, 1880-. Philadelphia and London, W. B. Saunders Company
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