ZOO 3733C Lecture Notes - Lecture 24: Bronchiole, Annular Ligament Of Radius, Hyaline Cartilage
Document Summary
Exam 3 study guide lungs (does not cover everything just hits the major stuff; dr. sa(cid:373)sa(cid:373)"s drawi(cid:374)gs help a lot) Hilum = area where vessels (bronchial, pulmonary, and lymphatic) enter and leave lung; found on mediastinal surface. Left lung smaller; has space for heart. Right lung wider and shorter; pushed up b/c of liver. Tracheobronchial tree and functions of airway epithelium (p. 162) Trachea c6 to t4 (carina); 12 cm long + 6 cm wide. Air-conducting components vs respiratory components (p. 165) Air-conducting (no gas exchange): nasal cavity pharynx trachea terminal bronchioles. Respiratory (gas exchange): respiratory bronchioles alveolar ducts alveoli (bab) Layers (inner to outer): epithelium (part of mucosal layer) lamina propria(part of musocsal layer) Tracheal (cid:862)horseshoes(cid:863) made of hyaline cartilage (16-20 of them along trachea) Annular ligament b/t cartilage; allows for elongation of trachea. Trachealis m. smooth m. located in post. trachea; innerv. by ans adjusts diameter of airway. Epithelium: pseudostratified ciliated columnar epithelium (upper airways)
