Here is the complete pdf lecture of ENT . Introduction to ENT Ear, Nose, and Throat (ENT) medicine focuses on the diagnosis, treatment, and management of disorders affecting the head and neck region . Anatomy of the Ear, Nose, and Throat Anatomy of the Ear External Ear: Auricle (Pinna): Collects sound waves. External Auditory Canal: Channels sound to the tympanic membrane. Tympanic Membrane (Eardrum): Converts sound waves into mechanical vibrations. Middle Ear: Ossicles (Malleus, Incus, Stapes): Transmit vibrations from the tympanic membrane to the inner ear. Eustachian Tube: Equalizes pressure between the middle ear and nasopharynx. Inner Ear: Cochlea: Converts mechanical vibrations into neural signals for hearing. Semicircular Canals: Regulate balance and spatial orientation. Vestibule: Contains the utricle and saccule for balance. Anatomy of the Nose and Paranasal Sinuses External Nose: Nasal Bone and Cartilage: Provides structural support. Nostrils (Nares): Entry poi...