In mammals, secondary palate is formed by union of

Options

A. Premaxilla, pterygoid and squamosal
B. Maxilla, quadrate and palatine
C. Premaxilla, maxilla and palatine
D. Premaxilla, quadrate and squamosal.

Answer

To determine how the secondary palate is formed in mammals, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Secondary Palate**: The secondary palate is an anatomical structure that separates the oral cavity from the nasal cavity. It consists of both hard and soft components. The hard palate is made up of bone, while the soft palate consists of fleshy tissue.

2. **Identifying the Components of the Hard Palate**: The hard palate is primarily formed by three bones:
- **Premaxilla**: This is the bone located at the front of the hard palate.
- **Maxilla**: This bone is situated behind the premaxilla and forms a significant part of the hard palate.
- **Palatine Bone**: This bone is located at the back of the hard palate and completes the structure.

3. **Evaluating the Options**: Now, we will analyze the provided options to see which combination of bones correctly forms the secondary palate:
- **Option A**: Premaxilla, pterygoid, and squamosal – Incorrect, as pterygoid and squamosal are not part of the hard palate.
- **Option B**: Maxilla, quadrate, and palatine – Incorrect, as quadrate is not involved in the formation of the secondary palate.
- **Option C**: Premaxilla, maxilla, and palatine – Correct, as these three bones are indeed the components of the hard palate.
- **Option D**: Premaxilla, quadrate, and squamosal – Incorrect, for the same reasons as option A.

4. **Conclusion**: Based on the analysis, the correct answer is **Option C: Premaxilla, Maxilla, and Palatine**.