Heart Flashcards
What is the primary function of the heart?
To pump blood throughout the body.
How many chambers does the heart have?
Four chambers.
What are the names of the four heart chambers?
Right atrium, right ventricle, left atrium, left ventricle.
Which chamber receives deoxygenated blood from the body?
Right atrium.
Which chamber pumps oxygenated blood to the body?
Left ventricle.
True or False: The heart has two types of valves.
True.
What are the two main types of valves in the heart?
Atrioventricular valves and semilunar valves.
What is the function of the atrioventricular valves?
To prevent backflow of blood from the ventricles to the atria.
What are the names of the atrioventricular valves?
Tricuspid valve and mitral (bicuspid) valve.
What is the role of the semilunar valves?
To prevent backflow of blood from the arteries into the ventricles.
What are the names of the semilunar valves?
Pulmonary valve and aortic valve.
Fill in the blank: The right ventricle pumps blood to the _____ through the pulmonary valve.
lungs.
Fill in the blank: The left atrium receives blood from the _____ through the pulmonary veins.
lungs.
What structure separates the left and right sides of the heart?
Septum.
True or False: The heart is a muscular organ.
True.
What is the name of the outer layer of the heart?
Pericardium.
What is the function of the coronary arteries?
To supply blood to the heart muscle.
What does the term ‘cardiac cycle’ refer to?
The sequence of events in one heartbeat.
Fill in the blank: The heart’s electrical system starts with the _____ node.
sinoatrial (SA).
What is the significance of the atrioventricular (AV) node?
It delays the electrical signal before it goes to the ventricles.
True or False: The left ventricle has thicker walls than the right ventricle.
True.
What is the purpose of the heart valves?
To ensure unidirectional blood flow.
What happens during diastole?
The heart muscle relaxes and chambers fill with blood.
What happens during systole?
The heart muscle contracts and pumps blood out of the chambers.
