Unit 4: Concept G: Thoracic Cavity and Respiratory System

Name the three subdivisions of the thoracic cavity.

1.) Pleural Cavity 2.) Bilateral Pulmonary Cavities 3.) Central Mediastinum

The nerve roots for the phrenic nerve are:

Anterior Rami of Cervical Spinal Nerves C3, C4, C5

A horizontal plane separates the superior and inferior mediastinum, between what sternal features does this plane pass and at what vertebral level does this plane pass?

Dividing line is an imaginary line between the sternal angle and T4-5 vertebral bodies

Describe the features of the LEFT lung

Has a lingula Has a superior lobe Has a cardiac notch Has 2 total lobes Has an apex and base

Describe the features of the RIGHT lung

Has an oblique fissure Has a horizontal fissure Has a middle lobe Has 3 total lobes Has an apex and base

What connects the mouth and nose?

Nasopharynx

What opens into the trachea?

The Larynogopharynx

The nasopharynx and laryngopharynx are connected by?

The Oropharynx

Inhaled air is filtered, warmed, and moistened in ?

The mouth and oral cavity