Anesthesia Key

Posterior Triangle of the Neck Print Section Listen Big Picture The neck region is divided into triangles to compartmentalize the contents. The sternocleidomastoid muscle divides the neck region into posterior…

Overview of the Oral Cavity Print Section Listen Big Picture The cheeks and lips border the oral cavity, with a space (the vestibule) between the cheeks, lips, and teeth. The…

Overview of the Nasal Cavity Print Section Listen Big Picture The nasal cavity is divided into two lateral compartments separated down the middle by the nasal septum. The nasal cavity…

Overview of the Pharynx Print Section Listen Big Picture The pharynx is a funnel-shaped, fibromuscular tube that extends from the base of the skull to the cricoid cartilage, where the…

The Ear Print Section Listen Big Picture The external ear collects sound waves and transports them through the external acoustic meatus to the tympanic membrane. The tympanic membrane vibrates, setting…

Cutaneous Innervation and Vasculature of the Face Print Section Listen Big Picture The sensory innervation of the face is provided by the three divisions of the trigeminal nerve [cranial nerve…

Anatomy of the Scalp Print Section Listen Big Picture The scalp consists of five layers of tissue. The five layers, from superficial to deep, are skin, subcutaneous connective tissue, a…

Overview of the Infratemporal Fossa Print Section Listen Big Picture The infratemporal fossa is the region deep to the ramus of the mandible. The infratemporal fossa accommodates the insertion of…

Anatomy of the Brain Print Section Listen Big Picture The brain contains millions of neurons arranged in a vast array of synaptic connections that provide seemingly unfathomable circuitry. Through that…

Overview of the Pterygopalatine Fossa Print Section Listen Big Picture The pterygopalatine fossa is the region between the pterygomaxillary fissure and the nasal cavity. The fossa accommodates branches of the…