Glossary with audio assistance

the act of swallowing

structure situated at the base of the hair follicle containing nerves and blood vessels, which supply nutrients necessary for hair growth

layer of dense connective tissue lying beneath the epidermis

the process of losing moisture or “drying out” when exposed to air

a chemical that disperses and removes soil, organic material and greasy residue from surfaces as well as reducing surface tension and increase the penetrating ability of water. This is a process that is important in allowing disinfectants to penetrate the pathogens underneath. Some disinfectants have their own detergent properties (eg the halogens – bleach and iodine, quaternary ammonium compounds).

a chemical solution which converts exposed silver bromide crystals into silver metal within the emulsion during processing

a space between teeth. There is a natural space in the jaw of rodents and herbivores where canine teeth would be found in other species.