Fact checked by Marley Hall In medicine, there are four levels of care: primary, secondary, tertiary, and quaternary. The levels of care refer to the complexity of the medical cases that ...

Geography KS3/GCSE. A short film for secondary schools explaining tertiary and quaternary industries, what they are and how they fit into global economy. BBC Teach.

Industry is any economic activity which creates jobs and generates income. All industry is made up of four sectors that are a linked together like a chain: primary, secondary, tertiary and ...

Although certain classes of chiral molecules (for example secondary alcohols3,4) are now easy to make selectively in the single mirror image form, one class—those containing quaternary ...

Public health, like medicine, focuses on three stages of prevention: primary, secondary, and tertiary. Primary prevention means preventing disease before it occurs by altering behaviors.

LAGUNA BEACH, CA-Deciding which markets are primary, secondary and tertiary can seem rather arbitrary, but defining those markets was part of the panel “Secondary vs. Tertiary Markets: Where ...

There are three main categories of wound healing, depending on treatment and wound type: primary, secondary, and tertiary. Learn more about these types here.