The Heart and Blood Vessels (blood flow in the heart) Flashcards
What is blood low in oxygen called?
Deoxygenated blood
What is deoxygenated blood?
Blood low in oxygen
Through what vein does deoxygenated blood enter the heart?
The vena cava
Does oxygenated or deoxygenated blood enter the heart through the vena cava?
Deoxygenated blood
Where does the deoxygenated blood enter after moving through the vena cava?
The right atrium
Before reaching the right atrium, where does the deoxygenated blood have to enter?
The vena cava
When deoxygenated blood enters the right atrium, what does the atrium do?
It contracts
What happens to the deoxygenated blood when the right atrium contracts?
It is forced down through the tricuspid valve
What happens to the vena cava after the right atrium has contracted?
The vena cava closes
Why does the vena cava close after the right atrium has contracted?
It closes to prevent the deoxygenated blood from flowing back out of the heart
After the deoxygenated blood has been forced through the tricuspid valve, where does it enter?
The right ventricle
When does deoxygenated blood enter the right ventricle?
After it has been forced out of the right atrium through the tricuspid valve
What happens after the deoxygenated blood enters the right ventricle?
The right ventricle contracts and the tricuspid valve closes
After the right ventricle has contracted and the tricuspid valve has closed, where is the deoxygenated blood forced?
It is forced out of the heart to the lungs through the semilunar valve in the pulmonary artery
What is oxygenated blood?
Blood rich in oxygen
