Artificial organ to become stronger and lighter, limiting the amount of extra energy necessary to operate the limb. Additional materials have allowed artificial limbs to look much more realistic. Prostheses can roughly be categorized as upper- and lower-extremity and can take many shapes and sizes. New advances in artificial limbs include additional levels of integration with the human body. Electrodes can be placed into nervous tissue, and the body can be trained to control the prosthesis. This technology has been used in both animals and humans. The prosthetic can be controlled by the brain using a direct implant or implant into various
Theology of the Body of love... [or] communion of persons"" but rather is a mere bodily union. On the other hand, the licitness of natural family planning (NFP) methods is held to be evident from the structure of the human body, which has natural periods of fertility and infertility. The morality of these methods was literally designed into the body, and use of them, unlike use of artificial contraception, can actually improve the dialog between couples which is expressed through the language of the body. Throughout these speeches the main emphasis is on the intrinsic "goodness" of the marital act. The power of love