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Content: 0:00 Introduction 0:50 Orientation of the Larynx 1:47 Cartilage of the Larynx 2:42 Thyroid Cartilage 3:30 Cricoid Cartilage 4:06 Epiglottis 4:31 Arytenoid Cartilages 5:11 Corniculate Cartilage 5:27 Cuneiform Cartilages 6:00 Ligaments and Joints 9:32 Laryngeal Wall 10:19 Tunica Mucosa 11:31 Tela Submucosa 13:06 Muscles of the Larynx 15:46 Tunica Adventitia 16:03 Laryngeal Cavity ------------------------------- 🫀 Join: / @taimtalksmed 📷 Follow my IG: / taimtalksmed 💝 Donation link: https://www.buymeacoffee.com/taimtalk... ------------------------------- Larynx Orientation: Located between the hyoid bone and the trachea and in front of the esophagus Skeletopy: C4-5 to C6-7 Function of the Larynx: ○ Air Passage ○ Produces sound through Phonation Cartilage of the Larynx: 3 Unpaired Cartilages ○ Epiglottis ○ Thyroid Cartilage ○ Cricoid Cartilage 3 Paired Cartilages ○ Arytenoid Cartilage ○ Corniculate Cartilage ○ Cuneiform Cartilage Thyroid Cartilage (Cartilago Thyroidea): Right Lamina (Lamina Dextra) Left Lamina (Lamina Sinistra) Laryngeal Prominence (Prominentia Laryngea) ○ Adam's Apple Superior Horn (Cornua Superiora) Inferior Horn (Cornua Inferiora) Cricoid Cartilage (Cartilago Cricoidea): Arch (Arcus) Plate (Lamina) Arytenoid Articular Surface (Facies Articularis Arytenoidea) Thyroid Articular Surface (Facies Articularis Thyroidea) Epiglottis: Lies behind the cartilage and hyoid bone Attached to the thyroid cartilage Function: Closing off for the respiratory system when you swallow and open up the respiratory pathway when you breath Arytenoid Cartilages (Cartilago Arytenoidea): Triangular Shape: Apex and Base Anterior Process: Vocal Process (Processus Vocalis) Posterior Process: Muscular Process (Processus Muscularis) Criocoid Articular Surface (Facies Articularis Cricoidea) Corniculate Cartilage (Cartilago Corniculata): Lies on top of the arytenoid cartilage Serves as an attachment point for muscles Cuneiform Cartilages (Cartilago Cuneiforme): Aryepiglottic Fold Cuneiform Tubercle (Tuberculum Cuneiforme ) Laryngeal Ligaments and Laryngeal Joints: Connections in the Larynx (Juncturae Laryngis): Continous Articulation (Synarthroses) ○ Cartilaginous (Synchondroses) ○ Fibrous (Syndesmoses) Discontinuous Articulation (Synovial) ○ Synovial Articulation (Articulatio) Continous Articulation (Synarthroses) Cartilaginous (Synchondroses) ○ Between the Corniculate Cartilage and Apex of Arytenoid Cartilage Fibrous (Syndesmoses) ○ Thyrohyoid Membrane (Membrana Thyrohyoid) ○ Cricothyroid Membrane (Membrana Cricothyroidea) ○ Cricotracheal Ligament (Ligamentum Cricotracheale) ○ Thyroepiglottic Ligament (Ligamentum Thyroepiglottica) ○ Hyoepiglottic Ligament (Ligamentum Hyoepiglotticum) Discontinuous Articulation (Synovial) Synovial Articulation (Articulatio) ○ Cricothyroid Articulation (articulatio cricothyroidea) ○ Cricoarytenoid Articulation (articulatio cricoarytenoidea) Laryngeal Wall Tunica Mucosa ○ Vestibular Fold (Lines by Respiratory Epithelium) ○ Vocal Fold (Lined by Stratified Squamous Epithelium) ○ Contain Laryngeal Glands and Lymph Nodules Tela Submucosa ○ Fibroelastic Membrane (Membrana Fibroelastica Laryngis) § Quadrangular Membrane (membrana quadrangularis) form vestibular ligament § Lateral Cricothyroid Ligament (Conus Elasticus) has a free margin forming the vocal ligament, which is a part of the vocal folds Muscles (And cartilage): ○ Muscles that open and narrow the laryngeal inlet (entrance) ○ Muscles that open and narrow the Rima Glottidis ○ Muscles that act on the vocal cord § Tenses Vocal Cord (Cricothyroid Muscle) § Decrease Tension of vocal cord (Vocalis Muscle) Tunica Adventitia ○ Tough connective tissue consisting mainly of dense collagen fibers Laryngeal Cavity: Laryngeal Vestibule (Vestibulum Laryngis) Glottis ○ Rima Glottidis § Anterior 3/5 is inter-membranous part § Posterior 2/5 is intercartilagineous part § Phonation: Vocal folds rub into each other ○ Laryngeal Ventricles (Ventriculus Laryngis) Infraglottic Cavity Sources used in this video: Memorix Anatomy 2nd Edition by Hudák Radovan (Author), Kachlík David (Author), Volný Ondřej (Author) Biorender University notes and lectures