PRESENTATION OUTLINE
Your heart is one of the main things in the circulatory system
A vein carries blood with no oxygen back to the heart
Veins have 4 layers called Endothelium, Elastic Tissue, Smooth Muscle, and Connective Tissue
Arteries carry blood with oxygen to the whole body
An artery has 3 layers called Intima, Media, and Adventitia
Capillaries branch off from veins and arteries
Your body has more than 120,000 veins and arteries that help keep you alive
