Exchange Of Substances- Mammalian Gas Exchange Flashcards
1
Q
What is the trachea?
A
The airway that leads from the mouth and nose to the bronchi.
2
Q
What is the structure of the trachea?
A
It is lined with mucus-secreting goblet cells and cillia. The cillia sweep microorganisms and dust away from the lungs.
3
Q
What are the bronchioles?
A
They have a similar structure to the bronchi but are narrower. They are located at the bottom of the trachea
4
Q
What are the alveoli ?
A
Tiny sacs that are the main site of gas exchange in the lungs.
5
Q
What are the structural adaptations of the alveoli?
A
- Large surface area to volume ratio.
- Good blood supply
- Thin walls.
