The type of epithelial cells which line the inner surface of fallopian tubes, bronchioles and small bronchi are known as:

Options

A. squamous epithelium
B. columnar epithelim
C. ciliated epithelium
D. cuboidal epithelium

Answer

To determine the type of epithelial cells that line the inner surface of fallopian tubes, bronchioles, and small bronchi, we can analyze the options provided:

1. **Squamous Epithelium**: This type consists of a single layer of flat cells. It is primarily found in areas where diffusion or filtration occurs, such as in the alveoli of lungs and capillaries. Since the fallopian tubes and bronchioles require different functions, this option is not suitable.

**Hint**: Think about the structure and function of squamous epithelium and where it is typically found.

2. **Columnar Epithelium**: This type features a single layer of tall, column-like cells, often with oval-shaped nuclei. It is mainly found in the digestive tract, where it aids in secretion and absorption. This does not align with the function of the fallopian tubes and bronchioles.

**Hint**: Consider the locations where columnar epithelium is commonly found and its primary functions.

3. **Ciliated Epithelium**: This type is characterized by columnar cells that have cilia on their surface. It often contains goblet cells that secrete mucus. The cilia help in moving mucus and trapped particles out of the respiratory tract and are also present in the fallopian tubes to assist in the movement of the egg. This type is indeed found in the bronchioles and fallopian tubes.

**Hint**: Recall the role of cilia in the respiratory system and reproductive system.

4. **Cuboidal Epithelium**: This type consists of cube-shaped cells and is involved in secretion and absorption, typically found in glands and kidney tubules. It does not match the requirements for the fallopian tubes and bronchioles.

**Hint**: Think about where cuboidal epithelium is located and its specific functions.

After analyzing all the options, the correct answer is **Ciliated Epithelium**. This type of epithelial cells lines the inner surfaces of the fallopian tubes, bronchioles, and small bronchi, facilitating the movement of substances through ciliary action.

**Final Answer**: Ciliated Epithelium