Question

Differentiate between the following:
Bronchus and alveolus

Answer 1

1. Bronchus: It is the respiratory tube that connects the trachea to the bronchiole.
2. Alveolus: Alveolus is a tiny sac or bag-like structure that is present on the terminal bronchioles.

Bronchus	Alveolus
1. The bronchus is a branch-like structure.	1. The alveolus is a sac or bag-like structure.
2. It is situated between the bronchioles and the trachea.	2. It is situated at the terminus of terminal bronchioles.
3. It has a thick wall.	3. It has a thin wall and performs diffusion.
4. The bronchi are the tubes that carry air into the lungs. Bronchioles carry air to small sacs in the lungs called alveoli at the end of the bronchi.	4. The function of alveoli is to transfer oxygen into the bloodstream and remove carbon dioxide from the bloodstream.