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Eustachian valve occurs in :-...

Eustachian valve occurs in `:-`

A

Connection between middle ear and Pharynx

B

Middle ear

C

Left ventricles of heart

D

Right auricle of heart

Text Solution

AI Generated Solution

The correct Answer is:
To answer the question "Eustachian valve occurs in:", we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Eustachian Valve**: The Eustachian valve is a structure that is involved in directing blood flow in the heart. It is important to know its function to determine its location. 2. **Function of the Eustachian Valve**: The Eustachian valve helps direct oxygen-rich blood from the inferior vena cava towards the foramen ovale during fetal circulation. 3. **Identify the Location**: The Eustachian valve is actually a ridge found in the right auricle (right atrium) of the heart. 4. **Eliminate Incorrect Options**: - **Middle Ear**: The Eustachian tube connects the middle ear to the pharynx, but it does not contain the Eustachian valve. - **Left Ventricle of Heart**: The Eustachian valve is not located here; it is specific to the right auricle. - **Connection between Middle Ear and Pharynx**: This is known as the Eustachian tube, not the valve. 5. **Conclusion**: Based on the function and location, the correct answer is that the Eustachian valve occurs in the **right auricle of the heart**. ### Final Answer: The Eustachian valve occurs in the **right auricle of the heart**. ---
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