What is the role of preclinical and clinical testing in drug development?
What is the role of preclinical and clinical testing in drug development?

What is the role of preclinical and clinical testing in drug development?
What is the process of discovery and development of potential new medicines?
What is the role of antitoxins in the immune system’s defence against disease?
How do white blood cells produce antibodies to defend against pathogens?
What is phagocytosis, and how does it help defend the body?
How do white blood cells help defend the body against pathogens?
What happens when a pathogen enters the body?
What is the role of the immune system in defending against disease?
How does the stomach contribute to the body’s defence against pathogens?
What is the role of the trachea and bronchi in defending against pathogens?