Concept explainers
Which of the following includes only structures enclosed within the mediastinum?
(a) lungs, esophagus, heart
(b) heart, trachea, lungs
(c) esophagus, trachea, thymus
(d) pharynx, thymus, major vessels
Introduction:
The mediastinum refers to the middle section of the thoracic cavity. This region is surrounded by the loose connective tissue and it consists of a group of structures inside the thorax.
Answer to Problem 11RFT
Correct answer:
The mediastinum is present inside the thorax and it is covered on the right and left side by pleurae. It involves a number of organs.
Explanation of Solution
Explanation for the correct answer:
Option (c) is given as esophagus, trachea, and thymus. Mediastinum region comprises organs like the heart and its vessels, esophagus, phrenic, cardiac nerves, lymph nodes, thymus, thoracic duct, and cardiac nerves. Hence, option (c) is correct.
Explanation for incorrect answers:
Option (a) is given as lungs, esophagus, and heart. The lymph nodes of the central chest are included. It consists of all the organs except the lungs. So, it is an incorrect answer.
Option (b) is given heart, trachea, and lungs. All the organs are included in the mediastinum except for the lungs. So, it is an incorrect answer.
Option (d) is given as pharynx, thymus, and major vessels. Mediastinum starts is the middle section of the body and pharynx lies above it. So, it is an incorrect answer.
Hence, options (a), (b), and (d) are incorrect.
Therefore, it can be concluded that mediastinum does not include lungs and consists of all the other organs present in the middle section.
Want to see more full solutions like this?
Chapter 1 Solutions
Human Anatomy, Books a la Carte Plus Mastering A&P with Pearson eText - Access Card Package (9th Edition)
- The mucosal portion of the trachea is lined with what type of cells?arrow_forwardWhat are pleura,pericardium and peritoneum?arrow_forwardWhich of the following matches correctly? A Pulmonary artery - Carries deoxygenated blood to the lungs B Superior vena cava - Receives deoxygenated blood from the lower body and organs C Inferior vena cava - Receives deoxygenated blood from the head and body D Hepatic artery - Carries deoxygenated blood to the gutarrow_forward
- How does the form of the respiratory epithelium follow its function?arrow_forwardWhereas bronchial refers to the airways in the lungs, brachial refers to the (a) back, (b) pharynx, (c) arm, (d) thigh.arrow_forwardWhat is the function of the mucous lining of the epithelium inthe respiratory tract?arrow_forward
- How would asthma indirectly affect the other systems of thebody?arrow_forwardWhy is the pulmonary circulation considered to be a circuit that keeps the lungs dry?arrow_forwardWhich of these statements about the pharynx is true? a. It extends from the nasal and oral cavities superiorly to the esophagus anteriorly. b. The oropharynx is continuous superiorly with the nasopharynx. c. The nasopharynx is involved in digestion. d. The laryngopharynx is composed partially of cartilage.arrow_forward
- 12. Pseudostratified ciliated columnar epithelium lines which of the following? 1. Oropharynx 2. Trachea 3. Nasopharynx 4. Oral cavity 5. Laryngopharynx A. 2 only B. 1 and 4 only C. 2 and 3 only D. 1,2,3, and 5 onlyarrow_forwardWhat is the lower respiratory tract made up of?arrow_forwardWhat is the role of the respiratory system in maintaining homeostasis?arrow_forward
- Cardiopulmonary Anatomy & PhysiologyBiologyISBN:9781337794909Author:Des Jardins, Terry.Publisher:Cengage Learning,