Respiratory System ppt.II

The cartilages are either hyaline or elastic in nature. These are:
Hyaline cartilages
–Thyroid (unpaired)
–Cricoid (unpaired)
–Arytenoid (paired)
Elastic cartilages
–Epiglottis (unpaired)
–Cuneiform (paired)
–Corniculate(paired
?T he lingual surface (or anterior surface) and upper part of the laryngeal surface (or posterior surface) are covered by stratified squamous non-keratinisedepithelium, and the rest of the laryngeal surface is covered by respiratory epithelium. he upper part of the laryngeal surface,wherethe epithelium is stratified squamous non-keratinised, shows the presence of some taste buds.
?Lamina propriaconsists of connective tissue with numerous serous and mucous glands.
?Elastic cartilage is present underneath the lamina propriaand provides the skeletal framework to the epiglottis.
The vocal old (true vocal cord) is lined by stratifedsquamous non-keratinisedepithelium which provides protection rom physical injury during its movement. The remaining parts of the interior of the larynx are lined by the respiratory mucosa.
?Underneath the lamina propria, laryngeal cartilages are present.
•These are thyroid, cricoid, epiglottis, corniculateand cuneiform cartilages; they are present in the wall o the larynx and form its skeletal framework.
•The thyroid, cricoid and most of arytenoid consist of hyaline cartilage
•whereas the epiglottis, corniculateand cuneiform are elastic cartilage.