3. Structure & Function of the
Human Lung System
Your learning has been successful if you can do the following:
Learn these so you can communicate this concept well.
Think back to Year 10 Science. On your diagram, label as many structures as possible:
larynx, trachea, cartilage rings, intercostal muscles, ribs, bronchi, bronchioles, alveoli, diaphragm.
The human lung system is made up of various structures that work together to air into and out of the lungs, as well as get OXYGEN into the blood and CARBON DIOXIDE out of the blood (gas exchange).
As the airways get smaller and smaller in diameter, they increase in numbers.
The largest airway is the TRACHEA, and there is only one. The trachea is lined with C-shaped cartilage rings. The rings allow the trachea tube to stay open and not collapse, allowing oxygenated air to enter the lungs as well and exhaled air to exit the body.
The smallest airways are the BRONCHIOLES, of which there are around 60,000!
These numerous bronchioles lead to around 600 million ALVEOLI!
Having so many alveoli increases the surface area that can do gas exchange.
The alveolar walls are also very thin and moist, and they are also surrounded by many of tiny CAPILLARIES. This allows efficient diffusion of oxygen and carbon dioxide to exchange.
Grass Level Task - Wordwalls!
Sky Level Task - Structure and Function
Label the structures and complete the table.
Sky Level Task - Education Perfect
Task called 'S1.10 Concept 3: Structure and Function of the Human Lung System.
Sky Level Task - Lung Dissection Laboratory
Watch the video, to prepare yourself for the lung dissection laboratory.