Vesicles of thyroid gland is composed of :-

Options

A. Simple squamous epi.
B. Simple cuboidal epi.
C. St. squamous epi.
D. St . Cuboidal epi.

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the composition of the vesicles in the thyroid gland. Vesicles are small structures within cells that can store or transport substances.

2. **Identifying the Options**: The options provided are:
- A) Simple squamous epithelium
- B) Simple cuboidal epithelium
- C) Stratified squamous epithelium
- D) Stratified cuboidal epithelium

3. **Analyzing Each Option**:
- **A) Simple squamous epithelium**: This type of epithelium consists of a single layer of flat cells and is primarily found lining blood vessels and alveoli in the lungs.
- **B) Simple cuboidal epithelium**: This epithelium consists of cube-shaped cells and is commonly found in glands, including the thyroid gland, where it forms the vesicles that secrete hormones.
- **C) Stratified squamous epithelium**: This is a multi-layered epithelium that provides protection and is found in areas like the esophagus, mouth, and vagina.
- **D) Stratified cuboidal epithelium**: This type consists of multiple layers of cube-shaped cells and is found in some glands, such as sweat and salivary glands.

4. **Determining the Correct Answer**: The vesicles of the thyroid gland are specifically composed of **simple cuboidal epithelium**. This epithelium is essential for the secretion of thyroid hormones.

5. **Final Answer**: The vesicles of the thyroid gland are composed of **simple cuboidal epithelium**.