Skip to content

Heart Health Center

Image Collection:

Human Anatomy

arteries

Picture of the Arteries

back button next button

© 2012 WebMD, LLC. All rights reserved.

The arteries are the blood vessels that deliver oxygen-rich blood from the heart to the tissues of the body. Each artery is a muscular tube lined by smooth tissue and has three layers:

  • The intima, the inner layer lined by a smooth tissue called endothelium
  • The media, a layer of muscle that lets arteries handle the high pressures from the heart
  • The adventitia, connective tissue anchoring arteries to nearby tissues

The largest artery is the aorta, the main high-pressure pipeline connected to the heart's left ventricle. The aorta branches into a network of smaller arteries that extend throughout the body. The arteries' smaller branches are called arterioles and capillaries. The pulmonary arteries carry oxygen-poor blood from the heart to the lungs under low pressure, making these arteries unique.

1 | 2 | 3

Today on WebMD

hdl letters stacked up
How to boost your ‘good’ cholesterol.
headache
Learn the causes.
 
Compressed heart
5 habits to change.
heart rate
What’s normal? What’s not?
 
Lower Cholesterol 02
QUIZ
Heart Foods Slideshow
Slideshow
 
Compressed heart
Article
doctor looking at xrays
Video
 
Heart Disease And Ed
SLIDESHOW
Lowering Cholesterol Slideshow
SLIDESHOW
 
lowering blood pressure
SLIDESHOW
Wide Awake For Heart Surgery
VIDEO
 

WebMD Special Sections