Anatomy & Physiology

Anatomy & Physiology Study Guide nasopharynx and the rest of the pharynx. The nasal cavity opens into the nasopharynx through a connection known as the internal nares. The Pharynx The pharynx is a chamber shared by the respiratory and digestive systems. It is spread between the internal nares and the entrances to the larynx and esophagus. The curving superior and posterior walls of the pharynx are tightly bound to the axial skeleton, but the lateral walls are flexible and muscular. The pharynx is divided into the nasopharynx, the oropharynx, and the laryngopharynx. The nasopharynx is the superior portion of the pharynx that connects to the posterior portion of the nasal cavity through the internal nares and is separated from the oral cavity by the soft palate. The oropharynx extends between the soft palate and the base of the tongue at the level of the hyoid bone. The narrow laryngopharynx , the inferior part of the pharynx, includes that portion of the pharynx between the hyoid bone and the entrance to the larynx and esophagus.

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