Thoracic Cavity.

Question 1

What is the thoracic cavity?

Answer 1

The space that is surrounded by the ribs and the diaphragm.

Question 2

What 3 things make up the walls of the thoracic cavity?

Answer 2

Muscles.

Bones.

Ligaments.

Question 3

What are the 5 boundaries of the thoracic cavity?

Answer 3

Cranial boundary. Thoracic inlet.

Dorsal boundary. Thoracic vertebral bodies.

Ventral boundary. Sternum.

Caudal boundary. Diaphragm.

Lateral boundary. Ribs and intercostal muscles.

Question 4

What is the thoracic inlet?

Answer 4

The oval opening located at the cranial region of the thoracic cavity.

Question 5

What are the lateral boundaries of the thoracic inlet?

Answer 5

The 1st pair of ribs and their respective cartilage.

Question 6

What is the dorsal area of the thoracic inlet protected by?

Answer 6

The first pair of thoracic vertebrae and the pair of longus coli muscles.

Question 7

What is located at the ventral aspect of the thoracic inlet?

Answer 7

The manubrium of the sternum.

Question 8

What 6 structures pass through the thoracic inlet?

Answer 8

The trachea.

The oesophagus.

The vego-sympathetic nerve trunk.

The recurrent laryngeal.

The phrenic nerve.

The first 2 thoracic nerves and several vessels.

Question 9

What are the 4 main organs in the thoracic cavity?

Answer 9

The lungs.

The heart.

The thymus gland.

The lymph nodes.

Question 10

What are the 7 structures that pass through the thoracic cavity?

Answer 10

The aorta.

The cranial and caudal vena cava.

The azygos vein.

The thoracic duct.

The smaller lymph vessels.

The oesophagus.

The vagal and phrenic sympathetic nerves.

Question 11

What are the 6 important strucutures that are found in the mediastinum?

Answer 11

The thymus.

The heart.

The aorta.

The trachea.

The oesophagus.

The vagus nerve.

Question 12

What are the 3 divisions of the mediastinum?

Answer 12

The cranial mediastinum.

Middle mediastinum.

The caudal mediastinum.

Question 13

What is the cranial portion of the mediastinum?

Answer 13

The portion of the mediastinum that lies cranially to the heart.

Question 14

What is the middle portion of the mediastinum?

Answer 14

The portion of the mediastinum that contains the heart.

Question 15

What is the caudal portion of the mediastinum?

Answer 15

The portion of the mediastinum that lies caudal to the heart.

Question 16

What covers everything in the thoracic cavity?

Answer 16

A serous membrane known as pleurae.

Question 17

What are the pleural cavities?

Answer 17

The spaces that lie between the outside of the lungs and the inside of the chest wall.

Question 18

How is pleurae labelled?

Answer 18

The labelling is based on the area that the pleurae cover.

Question 19

What is the parietal pleurae?

Answer 19

The parietal pleurae covers the walls of the of the thoracic cavity

Question 20

What are the 3 division of parietal pleurae?

Answer 20

Mediastinal pleurae.

Costal pleurae.

Diaphragmatic pleurae.

Question 21

What is pulmonary pleurae?

Answer 21

The pleurae that covers the lung.

Question 22

How is pleurae named?

Answer 22

Pleura can be named as to the organ that it covers.

Question 23

What are the lungs?

Answer 23

The organs in which oxygen from the atmosphere is exchanged for carbon dioxide that has come from the blood.

Question 24

How are the 2 lungs differentiated?

Answer 24

Into the right and left lung.

Question 25

What are the 3 features of the left lung?

Answer 25

A cranial lobe that is divided into a cranial part and a caudal part.

A caudal lobe.

Absence of a cardiac notch.

Question 26

What are the 4 features of the right lung?

Answer 26

A cranial lobe.

A medial lobe.

A caudal lobe.

An accessory lobe.

Question 27

What is the cardiac notch of the right lung?

Answer 27

The dip in the medial side of the right lung that creates space for the heart to fit into the thoracic cavity.