Blood vessels
Where does de-oxygenated blood come into the heart through?
Superior/ Inferior vena cava
The heart has this many chambers?
Four
The circulatory system moves this substance to cells for energy?
Oxygen
This common three-letter abbreviation stands for electrocardiogram?
ECG
This term refers to the phase when the heart contracts and pumps blood?
Systole
These vessels carry blood away from the heart?
Arteries
These upper chambers of the heart receive blood?
Atria
Blood picks up oxygen in these organs?
Lungs
This part of the ECG follows the QRS complex and represents ventricular repolarization.
What is the T wave?
This term refers to the phase when the heart relaxes and fills with blood?
Diastole
These tiny blood vessels allow gas exchange between blood and tissues?
Capillaries
This thick wall separates the left and right sides of the heart?
Septum
This circuit moves blood from the heart to the lungs and back?
pulmonary circulation
This spike on an ECG represents the contraction of the ventricles?
QRS
This node is known as the heart’s natural pacemaker
SA node
This is the largest artery in the human body?
Aorta
This thick wall separates the left and right sides of the heart?
Aortic valve
This term describes blood flow through the body excluding the lungs?
Systemic circulation
This wave represents atrial depolarization on the ECG?
P wave
The sound “lub-dub” heard through a stethoscope is caused by this
The sound “lub-dub” heard through a stethoscope is caused by this
These vessels have valves to prevent backflow of blood?
Veins
The heart is located in this cavity of the body?
Thoracic cavity
Where does oxygenated blood come into the heart through?
Pulmonary vein
The atrial repolarization is masked by what wave?
QRS wave
Blood pressure that’s too low is called this
Hypotension