function of the system.
The circulatory system is a body-wide network of blood, blood vessels, and lymph.
the relationship between the structure and function of arteries,capillaries and veins
function of veins-carry blood back to the heart
Structure of veins-walls are thinner then arteries, has valves that prevent back flow, veins have very low pressure
Structure of arteries-smooth inner layer, muscle tissue in middle, and outer wall flexible connective tissue; 3 layers
Function of arteries-carry blood away from the heart
Structure of capillaries-smooth inner layer, muscle tissue in middle, and outer wall flexible connective tissue; 3 layers
Function of capillaries-carry blood back to the heart
allow passage of nutrients and waste
the route of blood through the heart
bloods enters the heart through two large veins the inferior and superior
poor blood from the body the body into the rightt atrium of the heart
2 major disorders
.Asthma can make breathing difficult and trigger coughing, wheezing, and shortness of breath.
.a condition marked by severe pain in the chest, often also spreading to the shoulders, arms, and neck, caused by an inadequate blood supply to the heart.
.Normally this type of chest discomfort is relieved with rest, nitroglycerin or both.