. The eclectic guide to health; or, Physiology and hygiene ... Fig. 8. Lower Extremity. — of Femur. 2. Patella. 4. Tibia. 6. Tarsus. 7. Meta-tarsus. 8. Phalanges. THE OSSEOUS SYSTEM. 17. young persons contain much animal mat-ter, and the bones of old persons consistlargely of the mineral substance. It isby the combination of these two kindsof matter that the bones possess theirgreat strength. The mineral part makesthem hard, and the animal portion pre-serves their toughness and burning a bone, the animal part isdriven off by the heat, and the mineralpor
. The eclectic guide to health; or, Physiology and hygiene ... Fig. 8. Lower Extremity. — of Femur. 2. Patella. 4. Tibia. 6. Tarsus. 7. Meta-tarsus. 8. Phalanges. THE OSSEOUS SYSTEM. 17. young persons contain much animal mat-ter, and the bones of old persons consistlargely of the mineral substance. It isby the combination of these two kindsof matter that the bones possess theirgreat strength. The mineral part makesthem hard, and the animal portion pre-serves their toughness and burning a bone, the animal part isdriven off by the heat, and the mineralportion is left in the form of a white,brittle body, resembling chalk. By plac-ing a fresh bone in weak acid for a fewhours, the mineral part will be dissolved,and the animal part will remain. Theanimal part thus left will have the shapeand size of the original bone, but will beso soft that it may be tied in a knot. 21. The Structure of the Bones.—The long bones are so formed that theyare hollow cylinders. This shape givesthem great strength without the use ofmuch matter, and makes them sufficientlylarge without their being heavy. Theouter part is a dense, hard shell, buttoward the center the matter become
Size: 1606px × 1557px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, booksubjecthygiene, booksubjectphysiology, booky
