Flashcards in Anatomy & Physiology Deck (90)
What structures does the head contain?
External and internal structures of the ears, nose and mouth
Internal structures of the sinuses
What structures does the neck contain?
Internal structures of the pharynx and layrnx
What are the 3 subdivisions of the ear?
What does the external ear contain?
External auditory canal
What do the glands in the external ear secrete?
What is the TM?
Thin dividing wall between the external ear and the middle ear
What does the middle ear contain?
Ossicle muscles, ligaments, and mucosal folds
What are the 3 bones of the middle ear?
How are the ears connected to the nose?
What does the inner ear contain?
What two branches of the external carotid artery supply the ear?
Posterior auricular artery
Superficial temporal artery
Nerves which supply the external ear
Greater auricular nerve
Lesser occipital nerve
Nerves which supply the middle ear
Chorda tympani nerve
Tympanic plexus nerve
Nerves which supply the inner ear
Lymphatic drainage of the ear
What are the two functions of the ear?
How does the pinna/auricle contribute to hearing?
Collects and directs sound waves traveling into the ear canal
How does the ear canal contribute to hearing?
Resonates sound waves
Preserves elasticity of TM via temperature & humidity control
Contains glands to produce wax
Cilia to protect from FB
How does the middle ear contribute to hearing?
Through the vibrations of the TM, malleus, incus, and stapes
What are the functions of the Eustachian tube?
Air exchange: maintain equal pressure
Excretory: drainage for middle ear
Defense: prevents infection
What are the two muscles that attach tot he ossicles?
What does the cochlea contribute to hearing?
Organ of Corti, which sits on the basilar membrane, is stimulated to produce a "pitch"
Vestibulocochlear nerve transmits to brain
Which part of the cochlea transmits lower frequencies?
Which part of the cochlea transmits higher frequencies?
Purpose for Semi-circular Canals
Maintain balance regardless of head position or gravity
What is the sensory receptor of the semi-circular canals?
Functions of the Nose
3 bones of the roof of the nasal cavity
Floor of the nasal cavity consists of these bones
Palatine process of maxilla
Horizontal plate of palatine bone