from The Century Dictionary.
- Situated above an artery.
from the GNU version of the Collaborative International Dictionary of English.
- adjective (Anat.) Situated upon or above an artery; -- applied esp. to the branches of the bronchi given off above the point where the pulmonary artery crosses the bronchus.
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- adjective anatomy Situated upon or above an
artery; applied especially to the branches of the bronchigiven off above the point where the pulmonary arterycrosses the bronchus.
from Wiktionary, Creative Commons Attribution/Share-Alike License
This is termed the eparterial branch of the bronchus, because it arises above the right pulmonary artery.
The left bronchus has no eparterial branch, and therefore it has been supposed by some that there is no upper lobe to the left lung, but that the so-called upper lobe corresponds to the middle lobe of the right lung.
The left bronchus passes below the level of the pulmonary artery before it divides, and hence all its branches are hyparterial; it may therefore be looked upon as equivalent to that portion of the right bronchus which lies on the distal side of its eparterial branch.
This branch arises above the level of the pulmonary artery, and is therefore named the eparterial bronchus.