Which of the following glands consists of two lobes , interconnected with a thin flap of connective tissue ?

Options

A. Pituitary gland
B. Thyroid gland
C. Pineal gland
D. Parathyroid gland

Answer

To solve the question "Which of the following glands consists of two lobes, interconnected with a thin flap of connective tissue?" we will analyze each option provided.

### Step-by-Step Solution:

1. **Identify the Options**: The options given are:
- A) Pituitary gland
- B) Thyroid gland
- C) Pineal gland
- D) Parathyroid gland

2. **Analyze the Pituitary Gland**:
- The pituitary gland is known as the "master gland" and does consist of two lobes: the anterior and posterior lobes.
- However, these lobes are not interconnected by a thin flap of connective tissue; instead, they are connected to the hypothalamus by a stalk and are situated in a bony cavity called the sella turcica.
- **Conclusion**: This option is incorrect.

3. **Analyze the Thyroid Gland**:
- The thyroid gland is located in the anterior part of the neck and consists of two lobes: the right lobe and the left lobe.
- These two lobes are interconnected by a thin flap of connective tissue known as the isthmus.
- **Conclusion**: This option is correct.

4. **Analyze the Pineal Gland**:
- The pineal gland is located on the dorsal side of the forebrain and is responsible for secreting the hormone melatonin.
- It does not have lobes; hence, it cannot be interconnected by connective tissue.
- **Conclusion**: This option is incorrect.

5. **Analyze the Parathyroid Gland**:
- The parathyroid glands are located on the posterior side of the thyroid gland.
- They typically do not have distinct lobes and are not interconnected by connective tissue.
- **Conclusion**: This option is incorrect.

6. **Final Conclusion**:
- After analyzing all the options, the only gland that consists of two lobes interconnected by a thin flap of connective tissue is the **Thyroid gland**.
- Therefore, the correct answer is **Option B: Thyroid gland**.