A primary bronchus is the first branch off the trachea, further branching leads to the secondary bronchus and then tertiary as you get deeper into the lung.
The treachae divides into the primary bronchi. Then the primary bronchi divides into secondary bronchus, which then divides into tertiary bronchi.
tertiary
primary 3% secondary 17% tertiary 80%
primary, secondary, tertiary, and quaternary
Secondary and tertiary
secondary
First there's primary, then secondary and after that there's the tertiary colors. For example: Primary - Yellow Tertiary - Yellow-orange Secondary - Orange Tertiary - Orange-red Primary - Red Tertiary - Red-purple Secondary - Purple Tertiary - Purple-blue Primary - Blue Tertiary - Blue-green Secondary- Green Tertiary - Green-yellow Primary - Return to Yellow
14% primary, 47% secondary, 28% tertiary and 11% Quatary
Primary: 33% Secondary: 15% Tertiary: 52% Same as Philipenis'
secondary
asda is secondary
primary-81% secondary-3% tertiary-16% (includes quaternary industry which is 6% of the tertiary 16%