Jump the navigation


bronchiThis lung has been carefully split lengthwise, showing some of the bronchi as they branch to distribute air throughout the lung.  The top of the trachea (longitudinally sectioned and indicated by the yellow arrow) is shown at the top of the photo.

One primary bronchus branches from the trachea at the yellow circle and is also sectioned along its longitudinal axis.

Smaller secondary bronchi branch from the primary bronchus at the holes indicated with the black arrows (only three indicated).

As the bronchi branch out through the lung, they split into smaller and smaller passages, the smallest of which are bronchioles, the terminal part of the air passages.


Next: Diaphragm

Back to: Respiratory system overview

beaker duck hiker icon-a-to-z icon-arrow-circle-down icon-arrow-circle-up icon-arrow-down icon-arrow-left icon-arrow-right icon-arrow-up icon-calendar-no-circle icon-calendar icon-camera icon-clock icon-cv icon-dot icon-down-triangle icon-email-circle icon-email icon-external-link icon-facebook icon-flickr icon-generic-blog icon-google-plus icon-home icon-instagram icon-library icon-link-circle icon-link-inverted icon-linkedin icon-lock icon-magazine icon-map-pin icon-map2 icon-menu-hamburger icon-menu-mobile-a icon-menu-mobile-b icon-menu-x icon-mywhitman-cog icon-news icon-phone icon-pinterest icon-play icon-quote icon-search-a icon-search-b icon-search-mobile-a icon-search-mobile-b icon-share icon-snail-mail icon-tumblr icon-twitter icon-vimeo icon-youtube logo-whitman-nc-flat logo-whitman-nc-stacked logo-whitman-no-clocktower slider-category-arrow-2px slider-category-arrow-no-line slider-category-arrow-solid slider-category-arrow slider-category-line-2px slider-category-line-solid slider-category-line tc_icon-filmstrip-fl tc_icon-filmstrip-ln tc_icon-play-fl-closed tc_icon-play-fl-open tc_icon-play-ln-closed tc_icon-play-ln-open wifi