alleryStart learning →About how many terminal bronchioles does each lung contain?
AMore than 1000
BFewer than 100
CAbout 16 to 20
DAbout 25 to 30
Answer & Solution
Correct answer: A. More than 1000
1. Bronchioles are about 1 mm in diameter and branch repeatedly.
2. They branch until they become the tiny terminal bronchioles that lead to the gas exchange structures.
3. Each lung holds more than 1000 terminal bronchioles, so the first option is correct.
4. The figure of 16 to 20 belongs to the tracheal cartilage rings, which is the number the third option borrows.
_Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 22 "The Respiratory System", section 22.1 Organs and Structures of the Respiratory System_
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