Larynx is lined by ciliated pseudostratified columnar epithelium except vocal cords (lined by stratified squamous epithelium). The wall of larynx is reinforced by cartilage tissue. Large cartilages (cartilago thyroidea, cartilago cricoidea) and part of cartilago arytenoidea are composed of hyaline cartilage.

**Lining of Larynx**

The lining of the larynx, which is the voice box located in the upper part of the respiratory tract, is composed of a specific type of epithelium. The correct answer is option 'A', stratified ciliated columnar epithelium. Let's explore why this is the correct answer in detail.

**Epithelium in Larynx:**

The epithelial lining of the larynx plays a crucial role in its function. It helps to protect the underlying tissues, facilitates the movement of mucus and trapped particles, and assists in the production of sound during vocalization. Due to these functions, the epithelium of the larynx needs to have specific characteristics.

**Stratified Epithelium:**

The stratified epithelium is a type of epithelial tissue that consists of multiple layers of cells. This type of epithelium is found in areas that are subjected to mechanical stress, such as the skin and the oral cavity. The stratified epithelium provides protection against abrasion and injury.

**Ciliated Epithelium:**

Ciliated epithelium refers to the presence of cilia on the surface of the epithelial cells. Cilia are hair-like structures that extend from the surface of the cells and have a coordinated beating motion. They play a crucial role in moving mucus and trapped particles in a particular direction. In the larynx, the cilia help in clearing any mucus or foreign particles that may have entered during breathing or swallowing.

**Columnar Epithelium:**

Columnar epithelium is characterized by the presence of tall, elongated cells with a nucleus located towards the base of the cell. This type of epithelium is commonly found in the digestive tract, where it facilitates absorption and secretion. In the larynx, the columnar epithelium helps in the production of sound by participating in vocal fold vibrations.

**Conclusion:**

The correct answer is option 'A', stratified ciliated columnar epithelium, because it accurately describes the characteristics of the epithelial lining of the larynx. This type of epithelium provides protection, facilitates the movement of mucus and particles, and assists in sound production.

The trachea is lined by ciliated epithelium because it has cilia which is used to get rid of dust particles entering the tube not only trachea many organs in our body has ciliated epithelium e.g.. fallopian tube