heart Flashcards
What is the main function of the heart?
To pump blood throughout the body.
What are the four chambers of the heart?
Right atrium, right ventricle, left atrium, left ventricle.
True or False: The left ventricle pumps blood to the lungs.
False.
Fill in the blank: The __________ valve prevents backflow of blood from the aorta into the left ventricle.
aortic.
What type of blood does the right atrium receive?
Deoxygenated blood.
Which blood vessel carries oxygenated blood away from the heart?
Aorta.
What is the role of the coronary arteries?
To supply blood to the heart muscle.
True or False: The heart is a muscle.
True.
What is the function of the septum?
To separate the left and right sides of the heart.
What is the term for the heart’s natural pacemaker?
Sinoatrial (SA) node.
Fill in the blank: Blood enters the left atrium through the __________ veins.
pulmonary.
What is the purpose of valves in the heart?
To prevent the backflow of blood.
Which chamber of the heart has the thickest walls?
Left ventricle.
True or False: The pulmonary artery carries deoxygenated blood.
True.
What is cardiac output?
The volume of blood the heart pumps per minute.
What is the average resting heart rate for adults?
60 to 100 beats per minute.
Fill in the blank: The __________ is responsible for the contraction of the heart muscle.
myocardium.
What does ECG stand for?
Electrocardiogram.
Which part of the heart receives blood from the body?
Right atrium.
What is the role of the atrioventricular (AV) node?
To delay the electrical signal before it passes to the ventricles.
True or False: Arteries carry blood away from the heart.
True.
What is the purpose of the pericardium?
To protect and lubricate the heart.
What is the function of the right ventricle?
To pump deoxygenated blood to the lungs.
Fill in the blank: Blood is returned to the heart via the __________ veins.
venae cavae.
