Measurements and Main Results: HRV was found by immunohistochemistry in 9 of 14 bronchial biopsies from subjects with asthma (64.3%) and 2 of 6 nonasthmatic control ... www.ncbi.nlm.nih.gov/../PMC2383991.
The bronchialtrees are in your respiratory system. They look like trees with many branches if aveoli. They help pass the Oxygen in and the Carbon Dioxide out. wiki.answers.com/../What_is_the_function_of_bronchial_trees.
They write notes on cards, diagram the respiratory system and label it. Keeping Your Respiratory System Healthy (Very Quick Reader; Grades 4-6 . . . Review with the ... talk.rachaelraymag.com/../default.aspx