Thorax Lab 3 Module 2

OBJECTIVES:

2.3.1 Trace the course of a primary (main), secondary (lobar), and tertiary (segmental) bronchus to at least one bronchopulmonary segment.

2.3.2 Follow the path of pulmonary arteries and veins on the hilar surface of the lung, and trace their distribution to at least one bronchopulmonary segment.

2.3.3 Describe the flow of lymph from each lung, and identify the typical location of associated lymph nodes, whether or not they are visible on the images.

2.3.4 Trace the lymphatic drainage of the thoracic wall, pleura, and lungs, including the sequence of lymph nodes and drainage pathways.

SECTRA TABLE WORK: Page 1 of 4

	Begin with the trachea, the main airway conducting air from the larynx to the bronchi.
	Add the left and right main (primary) bronchi.

From this point, the bronchi divide into the lobar (secondary) bronchi, and then into segmental (tertiary) bronchi.

We will examine each lobe and its segmental bronchi individually in the steps that follow.

	Using the Highlight or Draw tool, identify the location of the carina, at the bifurcation of the trachea into right and left main bronchi. "Carina" means keel (as on a ship). When viewed with a bronchoscope (see picture below), the carina appears as a sharp, internal ridge resembling the keel of a boat.
	Rotate the model to visualize the tracheobronchial tree from the right side. This allows better appreciation of the branching pattern and orientation of the bronchi.


Tap on image to enlarge	Tap on image to enlarge