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The Cardiovascular System
The cardiovascular system transports important substances such as oxygen and nutrients between tissues and organs.
The Heart Contains:
A hollow, muscular organ that contracts at regular intervals, forcing blood through the circulatory system.
Two top chambers are artrias.
Two lower chambers are ventricles.
Tricuspid valve
Pulmonary valve
Bicuspid Valve
Aortic Valve

Blood Vessels:
After blood leaves the heart, it is pumped through a network of blood vessels to different parts of the body.
Arteries and arterioles:
Capillaries:
Venules and Veins:

Diseases of the Cardiovascular System:
Atherosclerosis
Coronary heart disease
Myocardial Infraction
Hypertension
Congestive heart failure