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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

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The cell is the structural and functional unit of all living organisms, and is sometimes called the "building block of life." Some organisms, such as bacteria, are unicellular, consisting of a single cell.
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The other main function is that of defense in the immune system. Lymph is very similar to blood plasma: it contains lymphocytes. It also contains waste products and cellular debris together with bacteria and proteins. Associated organs composed of lymphoid tissue are the sites of lymphocyte producti
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anatomy is the study of STRUCTURE of the body while physiology is the study of the function of the part of the body
Anatomy deals with the structure and parts of the body while physiology is the function of the the body parts
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its the fundamental unit of life or its the primary step in which two or more cell combine to form a tissue .
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Hydroxyapatite, also called hydroxylapatite, is a naturally occurring mineral form of calcium apatite with the formula Ca₅(PO₄)₃, but it is usually written Ca₁₀(PO₄)₆(OH)₂ to denote that the crystal unit cell comprises two entities. Hydroxyapatite is the hydroxyl endmember of the complex apatite gro
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