What is an antibiotic

Antibiotics are medicines that treat infections by killing bacteria. They won't work on viruses like the flu

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.

my teacher would say no s