The oral cavity extends from the lips to the oropharynx, or more specifically to level of the palatine tonsils. The oral cavity encompasses the vestibule and the oral cavity proper. The vestibule is the potential space between the lips or cheeks and the teeth and gums. The oral cavity proper extends from the alveolar ridge and teeth to the oropharynx. Dogs and cats have anisognathic jaws as the mandible is narrower than the maxilla and the teeth of the maxilla and mandible do not meet directly in occlusion.
The Mouth, Pharynx, and Esophagus – Anatomy and Physiology
The trachea , colloquially called the windpipe , is a cartilaginous tube that connects the pharynx and larynx to the lungs , allowing the passage of air , and so is present in almost all air- breathing animals with lungs. The trachea extends from the larynx and branches into the two primary bronchi. At the top of the trachea the cricoid cartilage attaches it to the larynx. This is the only complete tracheal ring, the others being incomplete rings of reinforcing cartilage. The trachealis muscle joins the ends of the rings and these are joined vertically by bands of fibrous connective tissue — the annular ligaments of trachea. The epiglottis closes the opening to the larynx during swallowing.
NOTE: The purpose of these anatomy tables is to provide a relatively comprehensive catalog in tabular form of the major anatomial structures found within a given organ system or region. You may find these tables helpful in reviewing anatomy, but they are NOT meant to be 'checklists' of all the structures that you are expected to find during your dissections. Course Information. Contact Faculty.
In this section, you will examine the anatomy and functions of the three main organs of the upper alimentary canal—the mouth, pharynx, and esophagus—as well as three associated accessory organs—the tongue, salivary glands, and teeth. The cheeks, tongue, and palate frame the mouth, which is also called the oral cavity or buccal cavity. The structures of the mouth are illustrated in Figure 1.