The larynx is very important especially if you’re a chatty person. It is composed of the following :

False vocal (ventricular) fold: Composed of Respiratory [a.] Epithelium made of pseudostratified epithelium with cilia and goblet cells. The pseudostratified columnar cells are basal bodies visible as a dark line at the base of the cilia. Goblet cells are clear, oval structures with heterochromatic nuclei adjacent to ciliated columnar cells. Beneath your epithelium is the basement membrane, an amorphous thick, pink band at the base of the epithelium. [b.] Sero-mucous glands that add moisture in order to aid n trapping contaminants.

Laryngeal Ventricle: a lateral diverticulum that separates the false folds from the true vocal cords.

True Vocal Cord: It is composed of the [a.] Vocal ligament, a thick band of connective tissue within the lamina propria near the surface of the vocal cord. It is composed of stratified squamous non-keratinized epithelium that covers the vocal ligament of the larynx. [b.] Vocalis Muscle is a skeletal muscle that underlies and regulates the tension o the vocal ligament. [c.] Respiratory epithelium covers the true vocal cord except for the region that covers the vocal ligament. [d.] Sero-mucous glands adds moisture the aid in trapping the contaminants.

The lungs consists of airways and structures for gas exchange. The lungs is composed of the following:

Primary Bronchi: It is composed of [a.] respiratory epithelium made of pseudostratified columnar epithelium. Beneath the epithelium is the [b.] basement membrane, a thick eosinophilic band. The [c.] Lamina propria is dense irregular connective tissue that is made up of bronchial cartilage (hyaline cartilage), sero-mucous glands, and smooth muscle.

Primary Bronchioles: From the bronchi the tissue transitions into the primary bronchioles. It is composed of [a.] epithelium that transitions from pseudostratified columnar to ciliated columnar epithelium as they decrease in diameter. [b.] Club cells are dome-shaped secretory cells, and variable amounts of [c.] smooth muscle is present.

Terminal Bronchioles: conducting airways that is composed of [a.] epithelium that transitions from simple. ciliated columnar epithelium to cuboidal epithelium. [b.] Club cells are more prominent, and variable amounts of [c.] smooth muscle is present.
Respiratory bronchioles: A mixture of conducting epithelium and alveoli where respiration occurs. The [a.] epithelium is a mixture of simple columnar and simple cuboidal epithelia. [b.] Club cells are also present, and [c.] small amounts of smooth muscles are present in the bronchioles.

The trachea is the long tube that connects your larynx to your bronchi. It is composed of the following:

Respiratory Epithelium: It lines the trachea and is composed of pseudostratified columnar epithelium with cilia and goblet cells. [a.] The columnar cells nuclei occur at different levels. [b.] Extended to 5 to 7 micrometers from the surface of the columnar epithelial cells. The dark line at their base is from their basal bodies. [c.] Basal cells are small cells found at the base of the epithelium that do not extend to the surface. [c.] Goblet cells are scattered cells that secrete mucus. The [d.] basement membranes separate the epithelium from the connective tissue beneath it. It is seen as a thick, eosinophilic band beneath the epithelium.

Lamina Propria: Dense irregular connective tissue that supports the epithelium. It contains ser-mucous glands that add moisture to add in trapping contaminants.

Tracheal cartilage: composed of hyaline cartilage. The perichondrium is a layer of dense irregular connective tissue that surrounds the cartilage.