Bronchial 4 Piece Model (Bronchial Tree)

Bronchial 4 Piece Model

Modèle de bronches en 4 pièces High-Contrast Color Coding: Enables students to distinguish between primary, secondary, and tertiary bronchi, assisting in the categorization of pulmonary segments.

Articulated Laryngeal Anatomy: Allows clinical practitioners to demonstrate vocal cord positioning and airway management, reinforcing advanced procedural training.

$43.43

Quick Answer: The Bronchial 4 Piece Model is a four-part bronchial tree model showing the airways that carry air into the lungs, from the windpipe through its division into the main bronchi and their branches. It is used in anatomy, nursing and respiratory physiology lessons on the structure of the airways.

The Branching Airways

Below the voice box the airway is a branching system of tubes. The windpipe, or trachea, is kept from collapsing by a stack of cartilage rings shaped like the letter C, their open side facing the oesophagus behind, and it splits at a ridge called the carina into the two main bronchi. Each main bronchus splits into lobar bronchi, three on the right and two on the left, matching the lobes of each lung, and these divide again into segmental bronchi serving the bronchopulmonary segments. After many further divisions the tubes become bronchioles, which have no cartilage and end in the air sacs where gas exchange takes place.

A bronchial tree model makes this branching visible in three dimensions, which is hard to grasp from a chest X-ray or a flat diagram. The title says the model has four pieces; older listing text described it as including the larynx, trachea and bronchial branches, but the listing does not state what each piece is, the scale or the material, and its product image is not currently available, so confirm these at enquiry.

The shape of the airways explains several practical points. Of the two main bronchi, the right is broader, shorter and closer to vertical, so an inhaled object, or a breathing tube passed too far, more often ends up on the right side. In asthma the smooth muscle around the smaller airways tightens and the lining swells, narrowing the tubes and causing wheeze. The human lung model shows the lobes this tree supplies, and the human respiratory system model places it in the chest.

Specifications

Model of	Human airways (bronchial tree), in four pieces
Structures commonly shown	Trachea, carina, main, lobar and segmental bronchi
Topics	Airway branching, lung lobes, bronchopulmonary segments
Users	Anatomy, nursing, physiotherapy and respiratory physiology courses
Content of each piece, scale and material	Confirm at enquiry

Teaching Uses

Anatomy lessons on the trachea, bronchi and lobes of the lungs
Explaining why inhaled objects usually enter the right main bronchus
Physiotherapy teaching on postural drainage of lung segments
Nursing lessons on airway suctioning and the position of breathing tubes

Care & Handling

Separate and reassemble the four pieces gently, supporting the thin branches of the bronchial tree model as you do so.
Keep the pieces together in their box or on the stand so none is lost.
Clean with a soft, slightly damp cloth and avoid solvents.

Why Choose LabEquip

Anatomy tutors, respiratory physiotherapy courses and nursing schools buy a bronchial tree model to show airway branching that a flat image cannot convey. LabEquip lists it among its biology lab products; to confirm what each piece shows, reach the team through the contact page.

Frequently Asked Questions

Why are there three lobar bronchi on the right and two on the left?

The right lung has three lobes and the left lung has two, because the heart takes up space on the left side of the chest. Each lobe is supplied by its own lobar bronchus.

What is the carina?

It is the keel-shaped ridge where the windpipe splits into the two main bronchi, lying behind the upper part of the breastbone. Its lining reacts strongly to touch, so an object or a suction catheter reaching it provokes a forceful cough.

Why do inhaled objects usually go into the right bronchus?

On the right, the main bronchus leaves the windpipe at a steeper angle and is broader and shorter than on the left, so it continues almost straight down. A falling object therefore follows the easier path into the right side.

Why are the tracheal cartilages C-shaped?

The cartilage rings stop the trachea collapsing when pressure inside it falls during breathing in. The gap at the back of each ring allows the oesophagus behind it to expand when food is swallowed.

What is the difference between bronchi and bronchioles?

Bronchi are the larger airways, supported by cartilage in their walls. Bronchioles are the smaller branches beyond them, which have no cartilage and are controlled by smooth muscle that can narrow or widen the airway.

What happens to the airways in asthma?

The smooth muscle around the smaller airways contracts, the lining becomes inflamed and swollen and extra mucus is produced. Together these narrow the airways, causing wheezing, coughing and shortness of breath.

Last Updated: September 2026