HB+Cardiovascular+System

=__Cardiovascular System__=



What are the two parts of the cardiovascular system?

 * The cardiovascular system consists of the heart and blood vessels.The heart pumps blood and the vessels are where blood flows. The beating of the heart sends blood into the blood vessels and, in humans, blood is always contained within blood vessels.

What are the functions of the cardiovascular system?

 * contractions of the heart generates blood pressure
 * blood vessels transport the blood
 * exchanges of nutrients, wastes, gases at the capillaries
 * the heart and blood vessels regulate blood flow

What are the types of blood vessels?

 * The different types of blood vessels are the arteries, the capillaries, and the veins.

Why is the heart a double pump?

 * The heart has a right and left side. Each side has an atrium and a ventricle. Valves keep the blood moving in the correct direction. The right side pumps deoxygenated blood to the lungs. The left side pumps oxygenated blood to the body.

What causes the "lub" and the "dup" of the heart sounds?

 * The softer lub sound is due to the slamming shut of the atrioventricular valves between the smaller atrium and larger ventricle. This is followed by the louder "dup" sound due to the slamming shut of the semilunar valves between the ventricles and the arteries taking blood away from the heart. These valves close with more force and make a louder sound. Lub DUP.

What does the pulse rate of a person indicate?

 * The pulse rate indicates the heart beat (pumping) rate

What accounts for blood flow in the arteries?

 * The blood pressure caused by the beating of the heart accounts for the flow of blood in the arteries.