Which of the following is true of the trachea A. Cartilaginous rings completely surround it B....
Which of the following is true of the trachea
| A. |
Cartilaginous rings completely surround it |
|
| B. |
it's diameter can expand and contract |
|
| C. |
it is found posterior to the esophagus |
|
| D. |
All of the above |
|
| E. |
None of the above |
Homework Answers
* The option B is true.
* A) There are about 16- 20 cartilogenous rings that surrounds the trachea which are incomplete and C- shaped.
* B) Trachea is made up of smooth muscle and connective tissue lined by inner mucosa layer, which slightly contracts and widens during breathing.
* C) Trachea descends anterior to the esophagus, but not posterior to esophagus. It enters superior mediastinum and divides into left and right main bronchi.
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Which of the following is true of the trachea
A.
Cartilaginous rings completely surround it
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