which of the following decidua layer forms a partition between developing embryo and lumen at uterus?

Options

A. decidua basalis
B. Decidua parietalis
C. Decidua capsularis
D. Centra decidua

Answer

To answer the question regarding which decidua layer forms a partition between the developing embryo and the lumen of the uterus, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Decidua**:
- The term "decidua" refers to the modified endometrium (the inner lining of the uterus) during pregnancy. After implantation of the embryo, the endometrium undergoes changes and is referred to as decidua.

2. **Identifying the Layers of Decidua**:
- There are three main layers of decidua that are important in the context of the question:
- **Decidua Capsularis**: This layer surrounds the embryo and forms a capsule-like structure.
- **Decidua Basalis**: This layer is in contact with the placenta and is located at the base of the embryo.
- **Decidua Parietalis**: This layer lines the rest of the uterine cavity.

3. **Determining the Layer that Forms the Partition**:
- The question specifically asks which layer acts as a partition between the developing embryo and the uterine lumen.
- The **Decidua Capsularis** is the layer that surrounds the embryo and separates it from the uterine lumen, effectively acting as a partition.

4. **Conclusion**:
- Therefore, the correct answer to the question is **Decidua Capsularis**.

### Final Answer:
- The decidua layer that forms a partition between the developing embryo and the lumen of the uterus is **Decidua Capsularis**.

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