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The Aorta and Its Principal Branches

Portion of Aorta

Major Branch

General Regions or Organs Supplied

Portion of Aorta

Major Branch

General Regions or Organs Supplied

Ascending aorta Arch of aorta

Right and left coronary arteries Brachiocephalic artery

Left common carotid artery Left subclavian artery

Descending aorta Thoracic aorta Bronchial artery Pericardial artery Esophageal artery Mediastinal artery Posterior intercostal artery

Heart

Right upper limb, right side of head Left side of head

Left upper limb

Bronchi Pericardium Esophagus Mediastinum Thoracic wall

Abdominal aorta

Celiac artery

Phrenic artery Superior mesenteric artery Suprarenal artery Renal artery Gonadal artery Inferior mesenteric artery Lumbar artery

Middle sacral artery Common iliac artery

Organs of upper digestive tract Diaphragm Portions of small and large intestines Adrenal gland Kidney

Ovary or testis Lower portions of large intestine Posterior abdominal wall

Sacrum and coccyx Lower abdominal wall, pelvic organs, and lower limb

3. Anterior choroid artery to the choroid plexus within the lateral ventricle of the brain and to nerve structures within the brain.

The internal carotid artery terminates by dividing into anterior and middle cerebral arteries. The middle cerebral artery passes through the lateral tissue and supplies the lateral surface of the cerebrum, including the primary motor and sensory areas of the face and upper limbs, the optic radiations, and the speech area (see chapter 11, pp. 414-415). The anterior cerebral artery extends anteriorly between the cerebral hemispheres and supplies the medial surface of the brain.

Near the base of each internal carotid artery is an enlargement called a carotid sinus. Like the aortic sinuses, these structures contain baroreceptors that control blood pressure. A number of small epithelial masses, called carotid bodies, also occur in the wall of the carotid sinus. These bodies are very vascular and contain chemoreceptors that act with those of the aortic bodies to regulate circulation and respiration.

Essentials of Human Physiology

Essentials of Human Physiology

This ebook provides an introductory explanation of the workings of the human body, with an effort to draw connections between the body systems and explain their interdependencies. A framework for the book is homeostasis and how the body maintains balance within each system. This is intended as a first introduction to physiology for a college-level course.

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