STRUCTURES OF THE RESPIRATORY SYSTEM

The body has a 6- to 10-minute supply of oxygen.

The nasal septum divides the nose into two hollow spaces called nasal cavities.

The nasal cavities are lined with a mucous membrane and have a rich blood supply.

The largest layer of cartilage on the larynx is commonly called the Adam’s apple.

Alveoli are made of one layer of squamous epithelial tissue and contain a rich network of blood capillaries.

The inner surfaces of alveoli are covered with a lipid substance called surfactant.

The left lung has three lobes, while the right lung has two lobes.

Which of the following statements about the sinuses is not true?

The pharyngeal tonsils are located in the ____.

The esophagus and trachea branch off of the ____.

The structures that allow for the exchange of oxygen and carbon dioxide between the lungs and blood are ____.

In order to carry air to both lungs, the trachea branches into two tubes called ____.

The membrane or sac that encloses each lung is a ____.