Which of the following valves guards the entry of the superior vena cava into the right atrium?

Haversian valve

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Eustachian valve

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Thebesian valve

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Tricuspid valve

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Solution

The correct option is A Haversian valve
The superior vena cava collects deoxygenated blood from the upper parts of the body (head and arms) and enters into the right atrium through the Haversian valve.
The inferior vena cava collects deoxygenated blood from the lower parts of the body and enters into the right atrium through the Eustachian valve.
The coronary sinuses collect deoxygenated blood from the heart walls and enter the right atrium through the Thebesian valve.
Tricuspid valve is found in between the right atrium and right ventricle and allows unidirectional blood flow.

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Excuse me sir / madam do the superior vena cava have valves ?

Match the following

Location valve

1) Opening of coronary sinus a) tricuspid valve

2) The base of pulmonary aorta b) bicuspid valve

3) The opening of inferior vena cava c) semilunar valve

4) Bet left atrium and left ventricle d) thebesian valve

5) Bet right atrium and right ventricle e) eustachian valves

\begin{matrix} Column I & Column II 1.Right atrium & i. Receives oxygenated blood from the lungs 2.Left atrium & ii. Passes the blood to aorta 3.Right ventricle & iii. Receives deoxygenated blood from the superior vena cava and inferior vena cava 4.Left ventricle & iv. Passes the blood to lungs through the pulmonary artery \end{matrix}

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