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.
tertiary
primary 3% secondary 17% tertiary 80%
Secondary and tertiary
secondary
14% primary, 47% secondary, 28% tertiary and 11% Quatary
Primary: 33% Secondary: 15% Tertiary: 52% Same as Philipenis'
asda is secondary
secondary
tertiary
primary-81% secondary-3% tertiary-16% (includes quaternary industry which is 6% of the tertiary 16%
Primary consumers eat primary producers(plant-eaters). Secondary consumers eat primary consumers (meat-eaters) Tertiary consumers eat secondary consumers. Quaternary consumers eat tertiary consumers.
Primary>Secondary relies on secondary to buy the output so it can be processed into finished goods Secondary>Primary relies on primary to extract raw materials for them to process Secondary>Tertiary relies on tertiary to distribute their finished goods to consumers/customers Tertiary>Secondary relies on secondary to supply finished goods for them to sell Primary>Tertiary relies on tertiary to distribute and market their goods to both secondary and consumers Tertiary>Primary relies on primary to use their services and thus provide a source of revenue