17. What are the three cartilages that form the larynx and describe each b. 18.

Question

17. What are the three cartilages that form the larynx and describe each b. 18. What is the glottis? 19. What is a true vocal cord? 20. What is it about vocal cords that cause people to have different pitches to their voice, including the tendency for males to have a deeper voice? Trachea 21. What is the trachea more commonly called? 22. What does the trachea do? Bronchi, Brenc hial Tree, and Lungs Bronchial Tree 23. What does the term bronchial tree refer to? Pulmonary vein Larynx ? Pulmonary atery Pimary bronchi Trachea Secondary bronchi Tertiary bronch Bronchioles 24. What is the purpose of a structure called the carina and where is it located? Aveolar duct Alreol Cardac notch 5. As with the trachea, the bronchi are supported by rings of cartilage...or WHAT purpose?

Explanation / Answer

17)The 3 cartilages that form larynx:the structural rigidity of the laryux is provided by 3 medial cartilages: the epiglottis, the thyroid cartilage, cricoid cartilage,a)epiglottis : it is a spoon shaped made of elastic cartilage, this cartilage rises the larynx so that to move down and form a lid over the glottis , closing it off, b)thyroid cartilage:it forms adams apple, it is prominent in males thyrohyoid membrane is a ligament connecting thyroid cartilage with the hyoid bone.c)circoid cartilage:ring of hyaline cartilage forms the inferior wall of the larynx it attaches to the top of the traches. 18)glottis:(rim glottidis) it is the part of the larynx, a natural space between the vocal folds , by the expansion and contraction of glottis causes voice modulation. 19)True vocal cords:or vocal folds or vocal reeds these are twin infoldings of mucous membrane stretched from back to front across the larynx these help in phonation by vibrating . 20)people have different pitches to their voices becauseit depends upon the rate of vibration of the vocal cords, the males have deeper voices because testosterone in males makes their vocal cords longer and thicker and larger and vibrate at lower frequencies. 21) trachea is commonly know as wind pipe(allowing the passage of air) .22) the trachea is to provide air flow to and from the lungs. 23) The term bronchial tree refers to the resemblance to the branches of a tree, as larger tubes perpetually concede to smaller tube in an intricate framework of branches. 24)carina: it is ridge of cartilage in the trachea that occurs between the division of the two main bronchi this occurs at the lower end of the trachea(usually at the level of the 4 th thoracic vertebra) the large air passages that lead from the trachea to the lungs. 25)The bronchi are supported by rings of cartilage it helps in to provide support they are stronger and flexible and these rings of cartilage helps the bronchi from collapsing when pressure drops

  

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