In adult human heart valves that allow the flow of oxygenated blood are

Options

A. Valve of Thebesius and mitral valve
B. Eustachian valve and pulmonary valve
C. Tricuspid valve and aortic valve
D. Mitral valve and aortic valve

Answer

To answer the question about which heart valves in the adult human heart allow the flow of oxygenated blood, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of the Heart**:
- The human heart consists of four chambers: the right atrium, right ventricle, left atrium, and left ventricle. It also has four main valves that regulate blood flow.

2. **Identify the Types of Blood**:
- Oxygenated blood is blood that has been enriched with oxygen from the lungs, while deoxygenated blood is blood that has returned from the body and is low in oxygen.

3. **Locate the Valves**:
- The heart has two types of valves that are relevant to the flow of oxygenated blood:
- **Mitral Valve (Bicuspid Valve)**: Located between the left atrium and left ventricle.
- **Aortic Valve**: Located between the left ventricle and the aorta.

4. **Determine the Flow of Oxygenated Blood**:
- Oxygenated blood enters the left atrium from the lungs via the pulmonary veins. It then flows through the mitral valve into the left ventricle. From the left ventricle, it is pumped through the aortic valve into the aorta, which distributes it to the rest of the body.

5. **Evaluate the Options**:
- Now, let's evaluate the provided options:
- **Option 1**: Bicuspid (Mitral) Valve and Tricuspid Valve - Incorrect, as the tricuspid valve is on the right side and deals with deoxygenated blood.
- **Option 2**: Eustachian Valve and Pulmonary Valve - Incorrect, as both are associated with deoxygenated blood flow.
- **Option 3**: Tricuspid Valve and Aortic Valve - Incorrect, as the tricuspid valve is on the right side.
- **Option 4**: Mitral Valve and Aortic Valve - Correct, as both are involved in the flow of oxygenated blood.

6. **Conclusion**:
- The valves that allow the flow of oxygenated blood in the adult human heart are the **Mitral Valve** and the **Aortic Valve**.

### Final Answer:
The heart valves that allow the flow of oxygenated blood are the **Mitral Valve** and the **Aortic Valve**.

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