2. Copyright 2009, John Wiley & Sons, Inc.
Structure of artery
Each artery is muscular tube lined by smooth tissue and has
three layers:
A. intima ; the innermost layer which made up of muscle tissue
called endothelium
B. the second layer is media or the middle layer :is thickest layer
made up of more smooth muscle that can dilate or constrict
which adjusted the pressure felt on the arterial walls during
systolic pumping on the muscle contracts :
The wail feel more pressure from the left ventricle and similar on
the vessel dilate and the pressure will drop
C. the last layer is the outer most known as the adventitia is
crucial foe connecting the arteries to other tissue in the body
3. AORTA
The largest artery in the body
Split into four different section:
1. Ascending aorta .
2. Aortic arch ( curve over the heart ).
3. The descending thoracic aorta .
4. The abdominal aorta .
Copyright 2009, John Wiley & Sons, Inc.
4. Connect to the heart by aortic valve and supplies
blood to the heart by RT and LT CORONARY
ARTERIS
LEFT MAIN CORONARY ARTERY DIVIDED IN :
LADCX Which supplies the left heart
RIGHT coronary artery supplies the RT HEART and
small part of the interventricular septum
Copyright 2009, John Wiley & Sons, Inc.
5. AORTIC ARCH
Gge rise of the brachiocefalic artery , left
common carotid artery , and left
subclavien artery
Copyright 2009, John Wiley & Sons, Inc.
