FunctionLarynx is intrinsic part of respiratory systemrole is protective  1. prevent air from escaping from lungs  2. prevent foreign substances from entering lungs  3. expel foreign substances threatening tracheanon‐biological role is as sound generatoronly when not performing biological roleholding breath when lifting heavy objectto make accessory muscles concentrate their strength in lifting by fixing up the rib cage in held breathReflex response.Larynx cannot be used in both sound generation (vibrating) and eating (closed)FrameworkFramework—Hyoid boneactually, supportive structure for root of tonguebut, suspends larynx and serves as attachment for extrinsic laryngeal musclesunique bone (only bone in larynx system) in that not attached to any other bone of skeletondoes not articulate with any other boneseverything else are cartilages3rd or 4th cervical vertebraheld in position by complex system of muscle and ligamentsituated in neck at level of C3, with greater cornu directed posteriorlynumber of muscles run between root of tongue and hyoid boneLarynx “hanging” onto hyoid boneGreater cornu directed posteriorlyLesser cornu directed superiorlyFramework—Thyroid Cartilagelargest laryngeal cartilagethyroid laminaangle of thyroidsuperior thyroid notchsuperior and inferior thyroid cornu (horn)Framework—Cricoid cartilageshaped like signet ringlocated immediately above upper tracheal cartilage  forms lower border of laryngeal frameworkarchquadrate lamina platearticular facetsFramework—Arytenoid cartilagespaired cartilages on sloping border of quadrate lamina  roughly resemble three sided pyramidmuscular processvocal processvocal ligamentnot part of arytenoid cartilage but attached to itextends from each vocal process of arytenoid to the angle of thyroid (meet at this point)apex*arytenoid, thyroid, cricoid cartilages are all hyaline cartilages!May become bone like with agingCSD 3112 1st Edition Lecture 16 Outline of Last Lecture I. Measurement Tools II. Pressurea. U-tube water manometerb. Pressure TransducerIII. Airflowa. Pneumotachographb. Body PlethysmographIV. Volumea. Wet SpirometerV. Chest and Abdominal Walla. Mercury Stain Gaugeb. Magnetometerc. Respiratory Induced PlethysmographyOutline of Current Lecture VI. FunctionVII. Frameworka. Hyoid boneb. Thyroid Cartilagec. Cricoid Cartilaged. Arytenoid cartilagesCurrent LecturePhonatory System Anatomy p1These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.FunctionLarynx is intrinsic part of respiratory system role is protective 1. prevent air from escaping from lungs 2. prevent foreign substances from entering lungs  3. expel foreign substances threatening trachea non‐biological role is as sound generator only when not performing biological role holding breath when lifting heavy objectto make accessory muscles concentrate their strength in lifting by fixing up the rib cage in held breathReflex response.Larynx cannot be used in both sound generation (vibrating) and eating (closed)FrameworkFramework—Hyoid boneactually, supportive structure for root of tongue but, suspends larynx and serves as attachment for extrinsic laryngeal musclesunique bone (only bone in larynx system) in that not attached to any other bone of skeleton does not articulate with any other boneseverything else are cartilages3rd or 4th cervical vertebraheld in position by complex system of muscle and ligament situated in neck at level of C3, with greater cornu directed posteriorly number of muscles run between root of tongue and hyoid boneLarynx “hanging” onto hyoid boneGreater cornu directed posteriorlyLesser cornu directed superiorlyFramework—Thyroid Cartilagelargest laryngeal cartilage thyroid laminaangle of thyroidsuperior thyroid notchsuperior and inferior thyroid cornu (horn)Framework—Cricoid cartilageshaped like signet ringlocated immediately above upper tracheal cartilage  forms lower border of laryngeal framework archquadrate lamina platearticular facets Framework—Arytenoid cartilagespaired cartilages on sloping border of quadrate lamina  roughly resemble three sided pyramid muscular process vocal processvocal ligamentnot part of arytenoid cartilage but attached to itextends from each vocal process of arytenoid to the angle of thyroid (meet at this point)apex*arytenoid, thyroid, cricoid cartilages are all hyaline cartilages!May become bone like with