BIOL 240 Lecture Notes - Lecture 31: Sinusitis, Lamina Propria, Sebaceous Gland
Document Summary
Gas conditioning: air is warmed, moistened and cleaned. Conducting zone: transports, filters, humidifies, and warms air. Respiratory zone: gas exchange occurs, composed of, bronchioles and al(cid:448)eoli"s. Nasal septum divides nasal cavity in midline (right and left halves: perpendicular plate of ethmoid bone, vomer, and septal cartilage. Connects with pharynx posteriorly though choanae (posterior nasal apertures) Floor is formed by palate (roof of mouth: anterior hard palate and posterior soft palate. Once the air goes through all these tunnels, air is being warmed, cleaned, and moistened. Vestibule (just above nostrils: lined with skin containing sebaceous and sweat glands and nose hairs, filters large particles. Underlying connective tissue lamina propria: mucous cells secrete mucous, serous cells secrete watery fluid with digestive enzymes. Together, all these produce a quart a day: dead junk is swallowed. 3- scroll like structures: superior concha, middle concha. Help the conchae assist in warming, moistening, and cleaning air.
