. The eclectic guide to health; or, Physiology and hygiene ... Fig. 9. Section of Femixe.—1. Ex-ternal view. 2. Cellularportion at end. 3. Hollowin middle. 4. Thick shellof middle. jg PHYSIOLOGY. shell of the bone is much thicker, so that these smallerparts may be strong also. The bones are covered with a tough membrane, calledthe periosteum. This membrane protects and nourishesthem. This tough cover, together with the many promi-nences and roughnesses on the bones, gives attachment tothe soft parts (muscles) that move the bones. 22. Minute Structure of the Bones.—The bones arefilled with myri
. The eclectic guide to health; or, Physiology and hygiene ... Fig. 9. Section of Femixe.—1. Ex-ternal view. 2. Cellularportion at end. 3. Hollowin middle. 4. Thick shellof middle. jg PHYSIOLOGY. shell of the bone is much thicker, so that these smallerparts may be strong also. The bones are covered with a tough membrane, calledthe periosteum. This membrane protects and nourishesthem. This tough cover, together with the many promi-nences and roughnesses on the bones, gives attachment tothe soft parts (muscles) that move the bones. 22. Minute Structure of the Bones.—The bones arefilled with myriads of tiny chambers, passages and openings permit nourishment to pass through thebones, See figures 10 and Fisr. 10. Longitudinal Section of Bonb(microscopic).—1. Cells. 2. Ca-nals. 3. Intercellular Substance.
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