65 Questions
What is the function of the atria when they are relaxed?
Receive blood from the body and lungs
What is the term for the singular form of the atria?
Atrium
Which atrium receives blood from the lungs?
Left atrium
What is the function of the atria when they are contracted?
Pump blood into the ventricles
What is the term for the plural form of the atrium?
Atria
The left atrium receives blood from the body.
False
The atria pump blood into the ventricles when they are relaxed.
False
There are three atria in the heart.
False
The right atrium receives blood from the lungs and the body.
False
The atria are located at the base of the heart.
True
What is the function of the ventricles when they are relaxed?
Receive blood from the atria
Which blood vessel does the left ventricle pump blood into?
Aorta
What divides the left and right sides of the heart?
Interventricular septum
What is the destination of the blood pumped by the right ventricle?
The lungs
Where are the ventricles located in the heart?
At the apex of the heart
The left ventricle pumps blood into the pulmonary artery.
False
The ventricles are located at the base of the heart.
False
The atria and ventricles are divided by an interventricular septum.
False
The ventricles receive blood from the atria when they are contracted.
False
The right ventricle pumps blood to the body.
False
The ventricles receive blood from the ______ when relaxed
atria
The ______ ventricle pumps blood to the body
left
The right ventricle pumps blood to the [blank)
lungs
The left and right ventricles are divided by an ______ septum
interventricular
The ventricles pump blood out of the heart when they are ______
contracted
What is the main function of the heart valves?
To ensure one-way flow of blood through the heart
Where are the atrioventricular valves located?
Between the atria and the ventricles
What type of valve is found in the pulmonary artery and aorta?
Semi-lunar valve
What is the structure of the heart valves composed of?
Leaflets or cusps
What is the purpose of the heart valves during ventricular contraction and relaxation?
To prevent backflow of blood
What is the main purpose of the heart valves during ventricular contraction and relaxation?
To prevent backflow of blood and ensure one-way flow
Where are the semi-lunar valves located in the heart?
In the arteries leaving the heart
What is the characteristic shape of the heart valves?
Leaflet-shaped
What is the location of the atrioventricular valves in the heart?
Between atria and ventricles
What is the function of the heart valves in ensuring a healthy circulation?
To prevent backflow of blood and ensure one-way flow
What is the primary function of the atrioventricular valves?
To prevent backflow of blood from the ventricle into the atrium
What is the characteristic shape of the semi-lunar valves?
Half moon
How many cusps does the right AV valve have?
3
What is the purpose of the aortic valve?
To prevent backflow of blood from the aorta into the ventricle
What is the name of the left AV valve?
Mitral valve
What is the main function of the atrioventricular (AV) valves?
Prevent backflow of blood from the ventricle into the atrium when the ventricle relaxes
What is the function of the semi-lunar valves in the heart?
Prevent backflow of blood from the arteries into the ventricle when the ventricle contracts
How many cusps does the left AV valve, commonly called mitral, have?
2 cusps
Where are the semi-lunar valves located in the heart?
In the arteries leaving the heart
What is the primary purpose of the aortic valve in the heart?
Prevent backflow of blood into the ventricle when the ventricle relaxes
The aortic valve prevents backflow of blood from the aorta into the ventricle when the ventricle relaxes.
True
The left AV valve is commonly called bicuspid and has three cusps.
False
Semi-lunar valves are situated between the ventricles and the atria in the heart.
False
The right AV valve, commonly called tricuspid, has two cusps.
False
The function of the AV valves is to prevent backflow of blood from the atria into the ventricles during contraction.
True
Match the heart valve with its location in the heart:
Right AV valve (tricuspid) = Between the right atrium and right ventricle Left AV valve (mitral) = Between the left atrium and left ventricle Aortic valve = In the aorta Pulmonic valve = In the pulmonary artery
Match the heart valve with its function:
Right AV valve (tricuspid) = Prevents backflow of blood from the right ventricle into the right atrium when the ventricle contracts Left AV valve (mitral) = Prevents backflow of blood from the left ventricle into the left atrium when the ventricle contracts Aortic valve = Prevents backflow of blood from the aorta into the left ventricle when the ventricle relaxes Pulmonic valve = Prevents backflow of blood from the pulmonary artery into the right ventricle when the ventricle relaxes
Match the type of valve with its characteristic shape:
Right AV valve (tricuspid) = Commonly called tricuspid – 3 cusps Left AV valve (mitral) = Commonly called mitral – 2 cusps Aortic valve = Semi-lunar shape Pulmonic valve = Semi-lunar shape
Match the heart valve with the chamber it separates:
Right AV valve (tricuspid) = Right atrium and right ventricle Left AV valve (mitral) = Left atrium and left ventricle Aortic valve = Aorta and left ventricle Pulmonic valve = Pulmonary artery and right ventricle
Match the heart valve with what it prevents:
Right AV valve (tricuspid) = Backflow of blood from the right ventricle into the right atrium when the ventricle contracts Left AV valve (mitral) = Backflow of blood from the left ventricle into the left atrium when the ventricle contracts Aortic valve = Backflow of blood from the aorta into the left ventricle when the ventricle relaxes Pulmonic valve = Backflow of blood from the pulmonary artery into the right ventricle when the ventricle relaxes
What is the main function of the cord-like tendons in the heart?
To prevent the valve leaflets from opening backwards into the atrium
Where are the chordae tendinae attached to?
The papillary muscles
What is the term for the nipple-like structures in the heart?
Papilla
During which phase of the cardiac cycle do the chordae tendinae play a crucial role?
Ventricular contraction
What type of valves do the chordae tendinae work with to prevent backflow?
Atrioventricular valves
The ______ tendons maintain the position of the valve leaflets during ventricular contraction.
cord-like
The chordae tendinae are attached to the ______ muscles.
papillary
The papillary muscles can contract and relax a small amount to help support the ______ tendinae.
chordae
The term ______ refers to the nipple-like structures in the heart.
papilla
The AV valves are found in the heart and have ______ tendons that prevent backflow.
cord-like
Learn about the two smaller chambers at the top of the heart, the left and right atria. Understand their function in receiving blood from the body and lungs when relaxed, and pumping blood into the ventricles when contracted.
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