Anatomy
How many chambers are in the heart?
4
What is the common name for myocardial infarction?
Heart Attack
What does the prefix “cardio-” refer to?
Heart
Which blood type is known as the “universal donor”?
O negative
Which chamber of the heart receives oxygenated blood from the lungs?
Left atrium
What condition is defined by chronic elevation of systemic arterial blood pressure?
Hypertension
What does the term “acute” mean in a medical context?
Sudden onset or short-term
How many hearts does an octopus have?
3
What valve separates the left atrium and left ventricle?
Mitral (bicuspid) valve
What condition causes the heart to beat irregularly?
Arrhythmia
What does the suffix “-itis” indicate?
Inflammation
Which animal’s heart is famously so large that it can weigh as much as a small car?
Blue Whale
Name the three layers of the heart wall from innermost to outermost.
Endocardium → Myocardium → Epicardium
What condition occurs when the heart muscle does not pump blood as effectively as it should, leading to fatigue and fluid buildup?
Heart Failure
Explain what a heart rate is.
The number of times your heart's ventricles contract and relax.
Which hormone is released during stress and can temporarily increase heart rate and blood pressure?
Adrenaline (epinephrine)
Which vessels return oxygenated blood from the lungs to the heart?
Pulmonary veins
What condition increases the risk of stroke because the upper chambers of the heart quiver instead of contracting normally?
Atrial fibrillation
Define bradycardia.
Abnormally slow heart rate
What part of the human body has no blood supply at all?
The cornea