Which structures are at the end of the smallest tubes in the lungs?
hope this helps
I think its the alveoli
From Google:
The small bronchi divide into smaller and smaller hollow tubes which are called bronchioles - the smallest air tubes in the lungs.
At the end of the smallest tubes in the lungs, there are tiny air sacs called alveoli. These tiny, grape-like structures are responsible for the exchange of oxygen and carbon dioxide between the lungs and the bloodstream.
To find this answer, you can refer to basic anatomy resources or textbooks that cover the structure and function of the respiratory system. These resources will usually have labeled diagrams or descriptions of the different parts of the lungs, including the alveoli. Additionally, you can also search online for reliable sources such as educational websites, medical journals, or videos that specifically explain the structure of the lungs and highlight the presence of alveoli at the end of the smallest tubes.