Save guides, add subjects and pick up where you left off with your BBC account. Respiration is a chemical reaction that happens in all living cells, including plant cells and animal cells. It is ...

There are over 600 muscles in your body. They make up over 40 percent of your weight and function in several different capacities. Several thousand small fibers make up every muscle.

In both groups, fitness, cellular respiration and the amount of mitochondrial enzymes in the skeletal muscles improved equally. The endurance training had no effect on the mitochondria in the ...

The depth of each inspiration is determined by the strength of the nerve stimulus to the muscles of respiration – the greater the stimulus, the greater the depth of respiration. The ventral group of ...

All muscles in the human body fit into one of three types or categories: "skeletal, smooth, and cardiac," explains Eric Hegedus, PT, PhD, a professor of rehabilitation sciences at Tufts University ...

Find out about back muscles, including their types and functions. Learn about the symptoms of back injury and how to strengthen your back muscles. Skip to main content ...

Draper and Whitehead and their co-workers1 have described a phenomenon which they have called ‘diffusion respiration’. In experiments with dogs, they have shown that the blood under certain ...

While both aerobic and anaerobic exercise have their place in a well-rounded fitness routine, anaerobic exercise can be more effective for weight loss. There’s much debate about what type of ...

Causes of painful respiration can include infections, injuries, and inflammation. Pain when breathing can sometimes also be due a potentially life-threatening condition, so it is important to be ...