and the infraorbital branch of the maxillary arteries. Drainage Veins of the nose include the angular vein that drains the side of the nose, receiving lateral nasal veins from the alae. The angular vein joins with the superior labial vein. Some small veins from the dorsum of the nose drain to the nasal arch of the frontal vein at the root of the nose. In the posterior region of the cavity, specifically in the posterior part of the inferior meatus is a venous plexus known as Woodruff's plexus. This plexus is made up of large thin-walled veins with little soft tissue such as muscle or fiber. The mucosa of the plexus is thin with very few structures. Lymphatic drainage From different areas of the nose superficial lymphatic vessels run with the veins, and deep lymphatic vessels travel with the arteries. Lymph drains from the anterior half of the nasal cavity, including both the medial and lateral walls, to join that of the external nasal skin to drain into the submandibular lymph nodes. The rest of the nasal cavity and paranasal sinuses all drain to the upper deep cervical lymph nodes, either directly or through the retropharyngeal lymph nodes. The back of the nasal floor probably drains to the parotid lymph nodes. Nerve supply The nerve supply to the nose and paranasal sinuses comes from two branches of the trigeminal nerve (CN V): the ophthalmic nerve (CN V1), the maxillary nerve (CN V2), and branches from these. In the nasal cavity, the nasal mucosa is divided in terms of nerve supply into a back lower part (posteroinferior), and a frontal upper part (anterosuperior). The posterior part is supplied by a branch of the maxillary nerve – the nasopalatine nerve which reaches the septum. Lateral nasal branches of the greater palatine nerve supply the lateral wall. The frontal upper part is supplied from a branch of the ophthalmic nerve – the nasociliary nerve, and its branches – the anterior and posterior ethmoidal nerves. Most of the external nose – the dorsum, and the apex are supplied by the infratrochlear nerve, (a branch of the nasociliary nerve). The external branch of the anterior ethmoidal nerve also supplies areas of skin between the root and the alae. The alae of the nose are supplied by nasal branches of CN V2, the infraorbital nerve, and internal nasal branches of infraorbital nerve that supply the septum