Sign InSign Up
All Posts

Anatomy of the Thoracic Region

Discover the secrets of the thoracic region, including its structure, functions, and disorders, with this comprehensive guide.


Anatomy is the scientific study of the structure of organisms and their parts. The thoracic region is a part of the body that is located between the neck and abdomen. It includes the chest wall, the thoracic aorta, the lungs, the heart, and the diaphragm. The thoracic region is essential for breathing and other vital functions, such as circulation of blood and lymphatic fluid. This article will provide a review of the anatomy of the thoracic region.

Chest Wall

The chest wall is the outermost layer of the thoracic region. It is composed of the ribs, sternum, costal cartilages, intercostal muscles, and thoracic vertebrae. The ribs are curved bones that attach to the sternum at the front and to the thoracic vertebrae in the back. The sternum is a flat bone in the center of the chest that connects the ribs. The costal cartilages are pieces of cartilage that connect the ribs to the sternum. The intercostal muscles are located between the ribs and help to move them during breathing. The thoracic vertebrae are the 12 bones of the spine that are located in the back of the thoracic region.

Thoracic Aorta

The thoracic aorta is the largest artery in the body and runs through the thoracic region. It begins at the aortic arch, which is located in the upper chest, and runs down to the diaphragm. It carries oxygenated blood from the heart to the rest of the body. The thoracic aorta has three major branches: the left subclavian artery, the left common carotid artery, and the right subclavian artery.


The lungs are two spongy organs located in the chest cavity and are responsible for supplying oxygen to the body and removing carbon dioxide. Each lung is divided into lobes. The left lung has two lobes, while the right lung has three. The lungs are connected to the trachea, which leads to the larynx and the pharynx. The lungs also connect to the bronchi, which lead to the smaller airways in the lungs.


The heart is a muscular organ located in the thoracic region. It is responsible for pumping blood throughout the body. The heart has four chambers: the right atrium, the left atrium, the right ventricle, and the left ventricle. The heart is connected to the great vessels, which carry oxygenated and deoxygenated blood to and from the heart.


The diaphragm is a dome-shaped muscle located between the thoracic and abdominal regions. It is responsible for controlling the pressure in the thoracic cavity and helps to regulate breathing. The diaphragm is connected to the ribs and the spine. It is also connected to the esophagus, the aorta, and the inferior vena cava.


The anatomy of the thoracic region is incredibly complex. It is composed of the chest wall, the thoracic aorta, the lungs, the heart, and the diaphragm. Each of these components plays an important role in the functioning of the body. It is important to have a thorough understanding of the anatomy of the thoracic region in order to diagnose and treat diseases and injuries of this region.

USMLE Test Prep
a StudyNova service


GuidesStep 1 Sample QuestionsStep 2 Sample QuestionsStep 3 Sample QuestionsPricing

Install App coming soon

© 2024 StudyNova, Inc. All rights reserved.