<< Chapter < Page Chapter >> Page >

Thoracic aorta and major branches

The thoracic aorta begins at the level of vertebra T5 and continues through to the diaphragm at the level of T12, initially traveling within the mediastinum to the left of the vertebral column. As it passes through the thoracic region, the thoracic aorta gives rise to several branches, which are collectively referred to as visceral branches and parietal branches ( [link] ). Those branches that supply blood primarily to visceral organs are known as the visceral branches    and include the bronchial arteries, pericardial arteries, esophageal arteries, and the mediastinal arteries, each named after the tissues it supplies. Each bronchial artery    (typically two on the left and one on the right) supplies systemic blood to the lungs and visceral pleura, in addition to the blood pumped to the lungs for oxygenation via the pulmonary circuit. The bronchial arteries follow the same path as the respiratory branches, beginning with the bronchi and ending with the bronchioles. There is considerable, but not total, intermingling of the systemic and pulmonary blood at anastomoses in the smaller branches of the lungs. This may sound incongruous—that is, the mixing of systemic arterial blood high in oxygen with the pulmonary arterial blood lower in oxygen—but the systemic vessels also deliver nutrients to the lung tissue just as they do elsewhere in the body. The mixed blood drains into typical pulmonary veins, whereas the bronchial artery branches remain separate and drain into bronchial veins described later. Each pericardial artery    supplies blood to the pericardium, the esophageal artery    provides blood to the esophagus, and the mediastinal artery    provides blood to the mediastinum. The remaining thoracic aorta branches are collectively referred to as parietal branches    or somatic branches, and include the intercostal and superior phrenic arteries. Each intercostal artery    provides blood to the muscles of the thoracic cavity and vertebral column. The superior phrenic artery    provides blood to the superior surface of the diaphragm. [link] lists the arteries of the thoracic region.

Arteries of the thoracic and abdominal regions

This diagram shows the arteries in the thoracic and abdominal cavity.
The thoracic aorta gives rise to the arteries of the visceral and parietal branches.
Arteries of the Thoracic Region
Vessel Description
Visceral branches A group of arterial branches of the thoracic aorta; supplies blood to the viscera (i.e., organs) of the thorax
Bronchial artery Systemic branch from the aorta that provides oxygenated blood to the lungs; this blood supply is in addition to the pulmonary circuit that brings blood for oxygenation
Pericardial artery Branch of the thoracic aorta; supplies blood to the pericardium
Esophageal artery Branch of the thoracic aorta; supplies blood to the esophagus
Mediastinal artery Branch of the thoracic aorta; supplies blood to the mediastinum
Parietal branches Also called somatic branches, a group of arterial branches of the thoracic aorta; include those that supply blood to the thoracic wall, vertebral column, and the superior surface of the diaphragm
Intercostal artery Branch of the thoracic aorta; supplies blood to the muscles of the thoracic cavity and vertebral column
Superior phrenic artery Branch of the thoracic aorta; supplies blood to the superior surface of the diaphragm

Questions & Answers

difference between seminiferous tubules and ejaculatory duct
Muhammad Reply
tell me the answer boss
Agemo Reply
what is azygous vein
Karan Reply
Sir muscle contraction ka topic kis part m milega
sonugora Reply
Sir muscle contraction ka topic kis part m milega
sonugora Reply
what is manipulated
Ambika Reply
life circle of RBC and the life circle of WBC.
Yemi Reply
RBC 120days
RBC 120days and WBC 10-12days
what is cardiac vascular system
what is anatomy?
Md Reply
what is manipulated
anatomy is the branch of medical science which deal with the gross structure of body or organ
note shoulder joint
what is cardiovascular system
what is manipulated
anatomical position
Study of internal structures
the system of heart and vessels
what is collar Bone?
positive feedback mechanism
Sirimala Reply
what is immunology
Riya Reply
immunology is a branch of medicine that study's the body immune system
Immunology This is the study of specific and non-specific resistance of the body against infection i.e. the study of the immune response of a host to a foreign substance, which includes study of various reactions which are induced in the body by introduction of a substance.
what is role of elimination need like fluid and also stools
Munmun Reply
what is joint pain
is the physical suffering caused by illness or injury of the joint
pls can someone describe shock,types ,pathophysiology and treatment
this is what I'm thinking "After taking out everything the body needs, the bowel then expels the leftover waste."
I think elimination also helps in the continuation of the digestive system because if the unwanted fluids and stools does not come out of the system it can create a problem in the digestive. system resulting in diseases.
shock is a condition whereby the circulating system is unable to get enough blood and oxygen to vital organs like the brain,heart,eye,kidney and others.
causing depression of those organs.
there are 2 classification of shock. primary shock: this occurs immediately after injury due emotional stimulus or pain.example hearing a bad news,sudden obstruction of airway.sudden heart attack. secondary shock :it occurs when primary shock is delayed
types of shock syncope (faint) oligaemic or hyppvovaemic shock. Anaphylactic shock. neurogenic/ physical shock septic sock catdiogenic shock.
What is the difference between dna duplication and chromosomes duplication?
to help you identify the human body parts to help you live a healthy life the study of Anatomy helps one to work in any health sector
sophia Reply
what is the function of the mitochondrial in the cell
Vida Reply
define and explain the synovial membrane
Mahmudu Reply

Get the best Anatomy & Physiology course in your pocket!

Source:  OpenStax, Anatomy & Physiology. OpenStax CNX. Feb 04, 2016 Download for free at http://legacy.cnx.org/content/col11496/1.8
Google Play and the Google Play logo are trademarks of Google Inc.

Notification Switch

Would you like to follow the 'Anatomy & Physiology' conversation and receive update notifications?