Injured at school? Then the nice nurse gives you drugs and medicines...

Even your ability to move around, all are controlled by these systems. Basically, they're electrochemical systems. When an accident causes injury to your body or a disease strikes, one or more of these systems may need help. [Music] One of the main ways we know how to help is by giving the body drugs and medicines. We use drugs and medicines to help identify illnesses [Music] and to prevent, treat, and cure them. Normally, your skin stops many germs from getting into your body. [Music] When it's broken, germs can enter and the body needs help. Chemical help. Antiseptics are medicines we put on the body's surface to kill the germs there and to keep them from entering.