Apothecary - An old-fashioned word for medicine seller.
Permeable - Allows stuff to pass through it.
Impermeable - Not allowing fluid to pass through.
Diffusion - The spreading of something more widely.
Concentration - Focusing on something.
Biotechnology - Used to make new products or technologies.
Replenish - To fill something up again.
Bacterial infection - When disease enters your body.
Pharmaceutical - Any kind of drug used for medical purposes.
Penicillin - An Antibiotic used to treat bacterial infections.
