Cardiovascular System

Ventricular relaxation

Blood circulates into the coronary arteries during

At the base of the ascending aorta

Blood flow in the coronary arteries originates

Atrial systole

Contraction of the upper chambers of the heart is called

The job will be taken over by the AV node

If the normal pacemaker of the heart fails

Coronary ischemia

Reduction in the heart's circulatory supply is called

Ventricular diastole

Relaxation of the lower chambers of the heart is called

Most Superior

The base of the heart is the portion that is

Four paired pumps

The best description of the heart is that it is

Sternum

The bone lying anterior to the heart

Atrioventricular valves closing

The first "lubb" heart sound is associated with

Myocardium Endocardium Visceral pericardium or epicardium Parietal pericardium

The following are considered a heart layer

Thymus Trachea Esophagus Heart Large Vessels

The following structures are contained in the mediastinum

Left coronary artery

The left atrium and ventricle are supplied blood by the

Tricuspid

The right atrioventricular valve is the

Vena Cava

The right atrium receives deoxygenated blood from the

Semilunar valves closing

The second "dup" heart sound is associated with

Myocardium

The thickest layer of the heart is the

Interatrial Septum

The tissue separating the two upper chambers of the heart is the

Coronary sinus

The vessels that drain the heart muscle are called

Coronary arteries

The vessels that supply blood to the heart are called

Purkinje fibers

Ventricular systole is triggered by the

The semilunar vavles are closed and the atrioventricular valves are open

When the ventricles are relaxed

The semilunar valves are opened and the atrioventricular values are closed

When the ventricles contract

SA Node

the pacemaker of the heart is normally the