Anti aging guide

The body’s chemical and physical composition when aging



Age-related changes and Is the chemical balance maintained in old age?

As we pass from youth through middle age and on into old age, there is a diminution in the lean body mass (LBM). This process starts at about 25 years of age and entails a reduction in our protein contains—there is less meat in us, less bone, and the solid internal organs such as kidneys and brain tend to shrink. Obviously, if we stay the same weight, our muscles are being replaced by fat, so it is healthier to lose weight as we age even if commoner to gain it! A man of 75 kg at the age of 25 has a LBM of 61 kg and he contains 13 kg of fat, but at the age of 65 his LBM is 49 kg and his contains of matiere grasse is 28 kg.

There is also a tendency to lose water, so for once stereotyping has a scientific basis and we really do become desiccated. The water contains of an embryo is approximately 90 percent, but it has fallen to 80 percent at birth, to 70 percent at age 20, and to 60 percent or less in old age. It is thought that most of the loss is from inside the cells rather than from the tissue spaces.

One of the fundamental characteristics of the aging organism is loss of adaptability. Our capacity to maintain a constant internal environment in the face of external environmental changes and challenges deteriorates. This capacity, most highly developed in warm-blooded creatures, is called homeostasis. Homeostasis depends on many organs, but principally perhaps the kidneys and the autonomic nervous system, both of which are liable to decline in function in old age and especially in certain diseases such as diabetes mellitus.

Posted by Carol Hudgens - April 27, 2012 at 10:38 am