. The animals and man; an elementary textbook of zoology and human physiology. Zoology; Physiology. 334 THE ANIMALS AND MAN Tmj the periosteum, which is bone- forming material. Surfaces for articulation with other bones are smooth and covered with cartilage (Cpl,Tr and Cp). A bone, sawed through the middle, as shown in fig. 170, exposes a dense layer of hard bone (b) enclosing, at the ends, a spongy mass of bone tissue (c), the spaces of which are filled with red marrow. Here red blood corpuscles are formed. The shaft encloses a space filled with yellow marrow (a). This is rich in fat and gela
. The animals and man; an elementary textbook of zoology and human physiology. Zoology; Physiology. 334 THE ANIMALS AND MAN Tmj the periosteum, which is bone- forming material. Surfaces for articulation with other bones are smooth and covered with cartilage (Cpl,Tr and Cp). A bone, sawed through the middle, as shown in fig. 170, exposes a dense layer of hard bone (b) enclosing, at the ends, a spongy mass of bone tissue (c), the spaces of which are filled with red marrow. Here red blood corpuscles are formed. The shaft encloses a space filled with yellow marrow (a). This is rich in fat and gelatin. This struc- ture secures the maximum of strength for a given amount of bone material. In the ribs, or other flat bones, the entire outer wall is dense and hard, while the entire central part is made up of a spongy mass of bone filled with red marrow. Chemical composition of bone.—Bone is formed from materials taken into the body with the food, chiefly lime, salts (mineral matter) and Fig. 169. Right humerus seen from in front. Cp, rounded surface of upper extremity; Tr, Cpl, round- ed surfaces of lower extremity. Tmj, Tm, El, Em, prominences for attachment of muscles; Aa (x—z) central shaft. (After Martin.). 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 Kellogg, Vernon L. (Vernon Lyman), 1867-1937; McCracken, Mary Isabel. New York, H. Holt and Company
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Keywords: ., bookcentury1900, bookd, booksubjectphysiology, booksubjectzoology
