4.1 Structure of the Human Gas-Exchange System Flashcards
1
Q
What are the two reasons for lungs being inside the body?
A
Air is not dense enough to support and protect the delicate structures
They would lose a lot of water and dry out
2
Q
What is the trachea?
A
It is a flexible airway that is supported by rings of cartilage.
3
Q
What are the bronchi?
A
These are two divisions of the trachea, each leading to one lung.
4
Q
What are the bronchioles?
A
A series of branching subdivisions of bronchi.
5
Q
What are the alveoli?
A
Minute air-sacs. They contain collagen and elastic fibres and are lined with epithelium.
