The embedding of _______X_____ in the _____Y____ of uterus is called implantation. Select the correct option for X and Y.

Options

A. `{:(X,Y),("Blastocyst","Endometrium"):}`
B. `{:(X,Y),("Blastocyst","Myometrium"):}`
C. `{:(X,Y),("Trophoblasts","Myometrium"):}`
D. `{:(X,Y),("Trophoblasts","endometrium"):}`

Answer

To solve the question regarding the embedding of certain structures in the uterus that is referred to as implantation, we will analyze the terms involved:

1. **Understanding the Terms**:
- **Implantation**: This is the process where a fertilized egg (or blastocyst) attaches itself to the lining of the uterus.
- **Blastocyst**: This is the stage of the embryo that occurs after the zygote has divided and formed a hollow ball of cells, which is crucial for implantation.
- **Endometrium**: This is the inner lining of the uterus where the blastocyst embeds itself during implantation.

2. **Identifying X and Y**:
- In the context of the question, we need to fill in the blanks for X and Y.
- X refers to the structure that embeds itself in the uterus, which is the **blastocyst**.
- Y refers to the specific part of the uterus where this embedding occurs, which is the **endometrium**.

3. **Conclusion**:
- Therefore, the correct answer is:
- X = Blastocyst
- Y = Endometrium

The complete statement would read: "The embedding of **blastocyst** in the **endometrium** of the uterus is called implantation."