Layers of the heart
What is the outermost layer of the heart?
Epicardium
What blood vessel brings oxygen-poor blood to the heart?
Vena cava
How many chambers does the heart have?
4
Which valve is between the right atrium and right ventricle?
Tricuspid valve
What does “cardio” mean?
Heart
What is the thick muscular layer of the heart?
Myocardium
Where does oxygen-poor blood enter the heart first?
Right atrium
What are the two upper chambers called?
Atria
Which valve is between the left atrium and left ventricle?
Mitral/bicuspid valve
What does “tachycardia” mean?
Abnormally fast heart rate
What is the inner lining of the heart called?
Endocardium
Which chamber pumps oxygen-poor blood to the lungs?
Right ventricle
Which chamber pumps oxygen-rich blood to the body?
Left ventricle
What is the function of heart valves?
Prevent backflow of blood
What does “bradycardia” mean?
Abnormally slow heart rate
Which heart layer is responsible for most of the heart's contractions?
Myocardium
What vessel carries oxygenated blood from the lungs to the heart?
Pulmonary veins
Which chamber has the thickest wall?
Left ventricle
What are the two semilunar valves?
Aortic and pulmonary valves
What is an “artery”?
A blood vessel that carries blood away from the heart
What is the protective sac surrounding the heart called?
Pericardium
Put the blood flow in order: vena cava → ___ → ___ → pulmonary artery.
Right atrium → right ventricle
Why is the left ventricle thicker than the right ventricle?
It pumps blood throughout the body
What happens if a heart valve does not close properly?
Blood can flow backward
What does “ischemia” mean?
Reduced blood flow/oxygen to tissue