emmabooth
|
Fat cells and muscle cellsMuscle and fat combined usually account for about well over half a person's weight. Men tend to have a higher ratio of muscle to fat than women. A person's weight depends on the number and size of muscle and fat cells. People with more and bigger muscle and/or fat cells will weigh more than a person with fewer and smaller cells.
We are born with a fixed number of muscle cells. This number remains the same for most of our lives. As a person grows, the size of these cells increases. However, an activity like weightlifting can also increase the size of muscle cells.
In the case of fat cells, people are usually born with between 5 billion and 10 billion of them. As we grow older, this number increases to about 20 billion for a thin person and to about 100 billion for an obese person.
|
