The blood vessels are part of the circulatory system and are composed of arteries, capillaries and veins. Arteries carry blood away from the heart, capillaries enable exchange between blood and tissues, and veins carry blood back to the heart. Blood vessels have three layers - tunica intima, tunica media and tunica adventitia. Capillaries are the smallest blood vessels. Anastomoses provide alternative routes for blood flow. There are different types of blood vessels including arteries, arterioles, capillaries, venules and veins. Common diseases of blood vessels include atherosclerosis and aortic aneurysm.

1. BLOOD VESSELS

2. INTRODUCTION
 The blood vessels are the part of the circulatory
system that transports
blood throughout the human body.
 There are three major types of blood vessels
 Arteries, which carry the blood away from the heart

3.  capillaries which enable the actual exchange of water
and chemicals between the blood and the tissues
 veins which carry blood from the capillaries back
toward the heart.

4. LAYERS OF BLOOD VESSELS
 Tunica intima thinnest layers
 Tunica media thickest layer of the arteries
 Tunica adventitia thickest layer of the vein
 Capillaries consist of little more than a layer
of endothelium and occasional connective tissue.

5.  When blood vessels connect to form a region of
diffuse vascular supply it is called an anastomosis
 Anastomoses provide critical alternative routes for
blood to flow in case of blockages.

6. TYPES OF BLOOD VESSELS
 Arteries
 Elastic arteries
 Distributing arteries
 Arterioles
 Capillaries (the smallest blood vessels)
 Venules
 Veins

7.  Atherosclerosis is a disease in which plaque builds
up inside your arteries.
 Bypass grafting is also known as coronary artery
bypass grafting
 Is a type of surgery that improves blood flow to the
heart
 Aortic aneurysm is a stretched and bulging section in
the wall of the aorta.

8. ICD-10-CM GUIDELINES
 Atherosclerosis-i70
 Aortic aneurysm and dissection-i71
 Other aneurysm-i72
 Other peripheral vascular diseases-i73
 Arterial embolism and thrombosis-i74

9.  Atheroembolism-i75
 Septic arterial embolism-i76
 Other disorders of arteries and arterioles-i77
 Diseases of capillaries-i78
 Disorders of arteries,arterioles and capillaries in
diseases classified elsewhere-i79
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