Cardiovascular System questions and 100%
verified answers 2025/2026 latest update
What is the function of the cardiovascular system? - answerTransportation
About how much does the heart weigh and what is it's size? - answerLess than a pound and the size of a
fist
Mediastinum - answerSpace between the lungs where the heart lies
Apex - answerThe pointed end of the heart that rests on the diaphragm (it is directed toward the left
hip)
Base - answerTop part of the heart that is broad
Pericardium - answerDouble-walled sac that the heart sits in and contains serous fluid between the
layers to prevent friction
Pericarditis - answerInflammation of the pericardium that results in the decrease in the serous fluid
What are the 3 layers of the heart wall? - answer1. Epicardium
2. Myocardium
3. Endocardium
Endocardium - answerA thin sheet of endothelium that lines the heart chambers, it is continuous with
the linings of the blood vessels (innermost layer of the heart wall)
How many hollow chambers does the heart has? - answer4
Atria - answerReceiving chambers, blood comes into the heart
, Where are the atria located? - answerSuperior
Ventricles - answerBottom chambers that send out blood
Interatrial or intraventricular septum - answerDivides the heart longitudinally
Which side of the heart receives oxygen-poor blood from the veins? - answerThe Right Side
Superior and Inferior Venae Cavae - answerThe veins that bring in blood from the upper and lower parts
of the body to the heart
Pulmonary Arteries - answerCarry blood to the lungs where oxygen is picked up and carbon dioxide is
unloaded. (Takes blood to the lungs)
Pulmonary Vein - answerVein that brings blood back from the lungs to the heart
Aorta - answerthe largest artery in the body that sends out oxygenated blood to the body
How many valves are contained within the heart? - answer4
What is the purpose of the valves? - answerAllows blood to flow in only one direction through the heart
chambers (from the atria through the ventricles)
Where are the Atrioventricula Valves (AV) located? - answerBetween the atrial and the ventricular
chambers on each side.
What do the AV nodes do? - answerThey prevent backflow into the atria when the ventricles contract
What is the left AV node called? - answerBicuspid or mitral valve
verified answers 2025/2026 latest update
What is the function of the cardiovascular system? - answerTransportation
About how much does the heart weigh and what is it's size? - answerLess than a pound and the size of a
fist
Mediastinum - answerSpace between the lungs where the heart lies
Apex - answerThe pointed end of the heart that rests on the diaphragm (it is directed toward the left
hip)
Base - answerTop part of the heart that is broad
Pericardium - answerDouble-walled sac that the heart sits in and contains serous fluid between the
layers to prevent friction
Pericarditis - answerInflammation of the pericardium that results in the decrease in the serous fluid
What are the 3 layers of the heart wall? - answer1. Epicardium
2. Myocardium
3. Endocardium
Endocardium - answerA thin sheet of endothelium that lines the heart chambers, it is continuous with
the linings of the blood vessels (innermost layer of the heart wall)
How many hollow chambers does the heart has? - answer4
Atria - answerReceiving chambers, blood comes into the heart
, Where are the atria located? - answerSuperior
Ventricles - answerBottom chambers that send out blood
Interatrial or intraventricular septum - answerDivides the heart longitudinally
Which side of the heart receives oxygen-poor blood from the veins? - answerThe Right Side
Superior and Inferior Venae Cavae - answerThe veins that bring in blood from the upper and lower parts
of the body to the heart
Pulmonary Arteries - answerCarry blood to the lungs where oxygen is picked up and carbon dioxide is
unloaded. (Takes blood to the lungs)
Pulmonary Vein - answerVein that brings blood back from the lungs to the heart
Aorta - answerthe largest artery in the body that sends out oxygenated blood to the body
How many valves are contained within the heart? - answer4
What is the purpose of the valves? - answerAllows blood to flow in only one direction through the heart
chambers (from the atria through the ventricles)
Where are the Atrioventricula Valves (AV) located? - answerBetween the atrial and the ventricular
chambers on each side.
What do the AV nodes do? - answerThey prevent backflow into the atria when the ventricles contract
What is the left AV node called? - answerBicuspid or mitral valve
