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2. Carina of trachea - Wikipedia

   en.wikipedia.org/wiki/Carina_of_trachea

   The carina is a cartilaginous ridge separating the left and right main bronchi that is formed by the inferior-ward and posterior-ward prolongation of the inferior-most tracheal cartilage. [2] The carina occurs at the lower end of the trachea - usually at the level of the 4th to 5th thoracic vertebra.

3. Sternal angle - Wikipedia

   en.wikipedia.org/wiki/Sternal_angle

   The sternal angle is used in the definition of the thoracic plane. [citation needed] The angle also marks the level of a number of features: Boundary between the superior and inferior portion of the mediastinum [citation needed] Passage of the thoracic duct from right to left behind esophagus [citation needed] Tracheal bifurcation.

4. Trachea - Wikipedia

   en.wikipedia.org/wiki/Trachea

   The trachea begins at the lower edge of the cricoid cartilage of the larynx [3] at the level of sixth cervical vertebra (C6) [2] and ends at the carina, the point where the trachea branches into left and right main bronchi., [2] at the level of the fourth thoracic vertebra (T4), [2] although its position may change with breathing. [3]

5. File:Diagram of cartilage cells called chondroblasts CRUK 032 ...

   en.wikipedia.org/wiki/File:Diagram_of_cartilage...

   Diagram of cartilage cells called chondroblasts. Date: 30 July 2014 (released by CRUK) Source: Original email from CRUK: Author: Cancer Research UK: Permission (Reusing this file) This image has been released as part of an open knowledge project by Cancer Research UK. If re-used, attribute to Cancer Research UK / Wikimedia Commons

6. Bronchus - Wikipedia

   en.wikipedia.org/wiki/Bronchus

   The carina of the trachea is located at the level of the sternal angle and the fifth thoracic vertebra (at rest). The right main bronchus is wider, shorter, and more vertical than the left main bronchus, [ 3 ] its mean length is 1.09 cm. [ 4 ] It enters the root of the right lung at approximately the fifth thoracic vertebra.

7. Carina - Wikipedia

   en.wikipedia.org/wiki/Carina

   Keel (bird anatomy), or carina, an extension of the sternum in some birds Carina of trachea , the point at which the trachea branches to form the two mainstem bronchi Carinae, in dinosaur anatomy , enameled ridges on the cutting edges of the teeth

8. Glossary of geography terms (A–M) - Wikipedia

   en.wikipedia.org/wiki/Glossary_of_geography_terms...

   This glossary of geography terms is a list of definitions of terms and concepts used in geography and related fields, including Earth science, oceanography, cartography, and human geography, as well as those describing spatial dimension, topographical features, natural resources, and the collection, analysis, and visualization of geographic ...

9. Respiratory tract - Wikipedia

   en.wikipedia.org/wiki/Respiratory_tract

   The upper respiratory tract can refer to the parts of the respiratory system lying above the vocal folds, or above the cricoid cartilage. [4] [5] The larynx is sometimes included in both the upper and lower airways. [6] The larynx is also called the voice box and has the associated cartilage that produces sound.