Exercise for health : its science and practice ... containing an anatomical, dumb-bell, and other charts, with full explanations / by H.H. Hulbert and Luis J. Phelan.

  • Hulbert, Henry Harper, 1863-
Date:
[1898]
Catalogue details

Licence: Public Domain Mark

Credit: Exercise for health : its science and practice ... containing an anatomical, dumb-bell, and other charts, with full explanations / by H.H. Hulbert and Luis J. Phelan. Source: Wellcome Collection.

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    MECHANISM OF JOINTS. IO3 joint ; and in addition to this, are covered by a smooth, shiny-polished substance, called cartilage. The cartilage is kept constantly moist by an oily fluid, Avhich has been called the joint oil. The bones are held together by strong tissue—somewhat like the tissue forming the tendons of muscles—called ligaments, which completely enclose the joint, and prevent the joint oil from escaping. Some joints, such as the knee, have strong bands, or ligaments, passing from one bone to the other, inside the joint as well as outside, to strengthen it. Call in at a butcher’s, and ask him to show you the joint of a recently-killed animal, and carefully note its structure. Examine the shape of the bones, next the cartilage cover- ing the bones, which will be quite moist if the joint has only just been opened ; and lastly, note the strength of the ligaments, which have been cut through in order to expose the inside of the joint. By doing this, you will fully realise how beautifully Nature has con- structed this piece of perfect machinery, guarding it against loss of substance by providing a natural oil for its lubrication. THE MUSCLES, o Covering the skeleton, and filling in the spaces between the bones, are the two