Thoracic Cavity My Own Questions

Question 1

Which structure forms the inferior boundary of the chest cavity?

Answer 1

Diaphragm

Question 2

The manubrium is:

Answer 2

The most superior portion of the sternum

Question 3

Which component of the sternum serves as an anchor for the diaphragm?

Answer 3

Xiphoid process

Question 4

The superior thoracic aperture:

Answer 4

Separates the thorax from the root of the neck

Question 5

True or false

The sternum is covered anteriorly by skin.

Answer 5

True

Question 6

True or false

The body is the smallest portion of the sternum.

Answer 6

False

Question 7

The thoracic cavity is enclosed laterally by

Answer 7

12 pairs of ribs

Question 8

The ____________ is the inferior margin of the thoracic cavity, closed by the diaphragm.

Answer 8

Inferior thoracic aperture (thoracic outlet)

Question 9

The jugular notch, also known as the suprasternal notch, is located on the ___________ of the sternum

Answer 9

Manubrium

Question 10

Name the three parts of the sternum

Answer 10

Manubrium, body, xiphoid process

Question 11

What are the osseous (bony) components of the thoracic skeleton?

Answer 11

Sternum, 12 thoracic vertebrae, ribs

Question 12

How many pairs of ribs form the lateral boundaries of the chest?

Answer 12

12

Question 13

Which type of ribs are also known as “true ribs”?

Answer 13

Vertebrosternal ribs

Question 14

The last two pairs of ribs are known as:

Answer 14

False and floating ribs

Question 15

The vertebrochondral ribs attach to the sternum:

Answer 15

Indirectly, via the cartilage of preceding ribs

Question 16

True or false

Vertebrosternal ribs include the first seven pairs of ribs.

Answer 16

True

Question 17

True or false

Vertebral ribs are considered true ribs.

Answer 17

False

Question 18

The last two pairs of ribs, which are also called floating ribs, have no anterior attachment to the ____________.

Answer 18

Sternum

Question 19

Ribs 8 through 10 are known as ____________ ribs, which attach to the cartilage of the preceding rib rather than directly to the sternum.

Answer 19

Vertebrochondral

Question 20

What are the three types of ribs based on their attachments?

Answer 20

Vertebrosternal, vertebrochondral, vertebral

Question 21

The thoracic spine connects with which part of the spine superiorly?

Answer 21

Cervical spine

Question 22

How many vertebrae are in the thoracic spine?

Answer 22

12

Question 23

Which muscle serves as the primary muscle of respiration?

Answer 23

Diaphragm

Question 24

The pectoralis major and pectoralis minor muscles are part of which muscle group?

Answer 24

Muscles of the pectoral region

Question 25

True or false The diaphragm separates the thoracic cavity from the abdominal cavity.

Answer 25

True

Question 26

True or false The intercostal muscles connect each rib to the ones above and below it.

Answer 26

True

Question 27

The thoracic spine is composed of twelve vertebrae labeled __________.

Answer 27

T1-T12

Question 28

The ___________ muscle group includes muscles like the pectoralis major and serratus muscle, which are associated with the upper extremity.

Answer 28

pectoral region

Question 29

With inhalation, the diaphragm _________ and moves downward.

Answer 29

contracts

Question 30

List the three groups of muscles in the back and shoulder region.

Answer 30

Superficial back muscles, deep back muscles, muscles in the scapular region

Question 31

The thoracic cavity is divided into which three major divisions?

Answer 31

Right pleural cavity, left pleural cavity, mediastinum

Question 32

The pleura has two layers; the __________ layer adheres to the lung, while the ____________ layer lines the chest wall.

Answer 32

Visceral; parietal

Question 33

Which of the following structures is NOT found in the mediastinum?

Answer 33

Right lung

Question 34

The inferior mediastinum is further divided into:

Answer 34

Anterior, middle, and posterior regions

Question 35

True or false The pleural cavity is a fluid-filled space between the visceral and parietal layers that decreases friction during respiration.

Answer 35

True

Question 36

True or false The superior mediastinum is located within the pleural cavities.

Answer 36

False

Question 37

The ________ pleura layer is adherent to the lung, while the _________ pleura layer lines the inner aspect of the chest wall, diaphragm, and pericardium.

Answer 37

visceral; parietal

Question 38

The ________ cavity is a thin, fluid-filled space that helps reduce friction between the two pleural layers of each lung.

Answer 38

Pleural

Question 39

The mediastinum is divided into four regions: superior, anterior, middle, and ___________.

Answer 39

Posterior

Question 40

The trachea begins as a continuation of which structure?

Answer 40

Larynx

Question 41

Which of the following is true about the right bronchus?

Answer 41

It is wider, shorter, and more vertical than the left bronchus

Question 42

The carina is located at the:

Answer 42

Bifurcation of the trachea into the bronchi

Question 43

The right lung has ________ lobes, while the left lung has _______ lobes.

Answer 43

3; 2

Question 44

True or false The trachea descends in front of the esophagus to enter the superior mediastinum.

Answer 44

True

Question 45

True or false The respiratory bronchioles are the largest part of the bronchial tree.

Answer 45

False

Question 46

The region where the trachea divides into the two bronchi is known as the _________.

Answer 46

Carina

Question 47

The _________ lung is typically larger than the ________ lung because the heart bulges into the mediastinum on the left side.

Answer 47

Right; left