Waiting for answer This question has not been answered yet. You can hire a professional tutor to get the answer.
Hello, I am looking for someone to write an article on Aging Biological Changes. It needs to be at least 1500 words.
Hello, I am looking for someone to write an article on Aging Biological Changes. It needs to be at least 1500 words. There are certain symptoms of old age that show in all humans, irrespective of gender, racial or geographical affiliation. These include a decline in hearing and sight. deteriorating immune system causing weaker resistance to diseases. weakening of muscles. reduction in flexibility of soft tissues and so on. Other visible signs of aging are wrinkled skin, graying of hair or hair loss, loss of vision, hypermetropia, hot flashes (women), and impotence. Symptoms of aging in animals resemble those in humans. Certain symptoms however differ, according to their evolutionary processes and mental ability.
For example, an aged lion, which is no longer a contributing member of the pack (i.e. has been ousted from his leadership role by a younger, healthier specimen and is incapable of further reproduction), voluntarily isolates himself and brings on his own death. This is to minimize wastage of resources and to make way for more viable populations. But, humans and elephants (due to their more complex social evolution) take care of their aged members, thereby lengthening the aging process. Thus, they display longer lifespans. This is a direct outcome of the evolutionary processes of aging. (This is evidence for the disposable soma theory, mentioned later) “There are also many species of plants that show clear signs of senescence. Some, such as bamboo, reproduce, age, and die at well defined times indicating a pre-programmed mechanism. Many species of plants also show a slow aging rate. Examples are well known in agriculture such as apple, orange, and other fruit trees.” (http://www.senescence.info/nature.html)
Taking the example of the loss of hair. It is usually observed at a later age because, at old age, hair follicles lose their ability to re-grow. Also, loss of memory, delayed reactions and insomnia generally affect older individuals due to the gradual loss of brain tissues, which are not replaced by newer cells. Another common symptom of old age is joint-aches.