| bifurcatio tracheae | The division of the trachea into the right and left main bronchi; it occurs at the level of the fifth or sixth thoracic vertebral body and is marked internally by the presence of a carina or keel-like ridge between the diverging bronchi. Synonym: bifurcatio tracheae. (05 Mar 2000) |
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| bifurcatio | Synonym: bifurcation. (05 Mar 2000) |
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| bifurcatio aortae | The division of the aorta into right and left common iliac arteries; it occurs at the level of the fourth and fifth lumbar vertebral body. Synonym: bifurcatio aortae. (05 Mar 2000) |
| bifurcatio trunci pulmonalis | The division of the pulmonary trunk into right and left pulmonary arteries. Synonym: bifurcatio trunci pulmonalis. (05 Mar 2000) |
| carina tracheae | The ridge separating the openings of the right and left main bronchi at their junction with the trachea. Synonym: carina tracheae. (05 Mar 2000) |
| paries membranaceus tracheae | The part of the tracheal wall posteriorly that is not reinforced by tracheal cartilages. Synonym: paries membranaceus tracheae. (05 Mar 2000) |
| tunica mucosa tracheae | The inner mucous layer of the trachea. Synonym: tunica mucosa tracheae. (05 Mar 2000) |
| tunica muscularis tracheae | Muscular layer of the tracheal wall. Synonym: tunica muscularis tracheae. (05 Mar 2000) |
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