Atria

Question 1

What are the atria?

Answer 1

Smaller chambers of the heart

Question 2

Where do atria lie?

Answer 2

Superior (above) ventricles

Question 3

How many atria is there?

Answer 3

2

Question 4

Where does the right atrium receive blood from?

Answer 4

3 veins
Superior vena cava
Inferior vena cava
Coronary sinus

Question 5

Where does the superior VC drain blood from?

Answer 5

Upper parts of the body

Question 6

Where does the inferior VC drain blood from?

Answer 6

Lower parts of the body

Question 7

Where does the coronary sinus drain blood from?

Answer 7

Coronary circulation of the heart itself

Question 8

What is the atria divided by?

Answer 8

Interatrial septum

Question 9

Atria have thinner walls than…

Answer 9

Ventricles

Question 10

Between atria & ventricles, there are 2 valves, what are these?
What is the purpose of these valves?

Answer 10

Tricuspid (between right atrium & ventricle)
Bicuspid (between left atrium & ventricle)
Purpose is to prevent backflow of blood