Why bacteria disease are difficult to control

Viruses pose a challenge to the body’s immune system because they hide inside cells meaning it is harder for them to control the disease. It can easily spread from cell to cell and can be hard to control meaning we look to our immune system to help and to give our body the support it need to fight it off.

when you breathe in, or inhale, your diaphragm contracts (tightens) and moves downward. this increases the space in your chest cavity, into which your lungs expand. the intercostal muscles between your ribs also enlarge the chest cavity. they contract to pull your rib cage both upward and outward when you inhale.