Why does the body change? By Jedediah- Health
The body changes with aging because changes occur in individual cells and in organs. These changes result in changes in function, In appearance, And thus in the experience of aging.
As cells age, They function less well. Eventually, they must die, As a normal part of the bodies functioning.
because they do not divide normally Or because they are damaged.
cells may be damaged by harmful substances in the environment, Such as radiation, sunlight, And chemotherapy drugs Sales may also be damaged by certain byproducts of their own normal activities.
byproducts called free radicals are given off when cells produce energy. Many cells die because her jeans contain a program process that, When triggered, Results in the death of the self.
This programmed death, Called a pulse process, Is it kind of cell suicide.
Reasons for sale suicide include replacing old cells with new ones and eliminating excess cells.
Also, Cells die because they can divide only a limited number of times This limit is also programmed by genes. when a cell no longer divides, It grows larger, Exists for a while, then dies.
The mechanism that limits cell division involves a structure called a telomere. Telomeres are used to move the cells genetic material in preparation for the cell division. Every time a cell divides,
The telomeres shorten a bit. Eventually, the telomeres become so short that the cell can no longer divide. The telomeres of cancer cells unlike those abnormal cells, Do not shorten each time the cell divides. Consequently, Cancer cells can divide forever.
How well organs function depends on how well these cells within them function. Older cells function less well. Also, in some organs, cells die and are not replaced, so the number of cells decreases.
The number of cells in the testes, Ovaries, Liver, And kidneys decreases markedly as the body ages. When the number of cells becomes too low, In Oregon cannot function normally.
Thus, Most organs function less well as people age. However, not all organs lose a large number of cells. The brain is one example.
Healthy older people do not lose many brain cells. Substantial losses occur mainly in people who have had strokes or who haveAlzheimer’s disease or Parkinson’s disease.
A decline in one’s organs function, due to a disorder or to aging itself, Can afflict the function of another.
For example, if atherosclerosis Narrows blood vessels to the kidneys, The kidneys function list well because blood flow to them is decreased.
Thank you for reading I hope this helps you more than ever!! And be sure to pop back for the tomorrow’s blog post!
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