GENERAL HISTOLOGY

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RESPIRATORY SYSTEM

STRUCTURE OF TRACHEA

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
The cartilages of the secondary bronchi are ____, but farther along the branches of the bronchial tree they become ____
A
massive, smaller
B
smaller, massive
C
longer, shorter
D
shorter, longer
Explanation: 

Detailed explanation-1: -As the branching continues through the bronchial tree, the amount of hyaline cartilage in the walls decreases until it is absent in the smallest bronchioles. As the cartilage decreases, the amount of smooth muscle increases.

Detailed explanation-2: -The secondary bronchi is also present towards the middle of the lungs where it possesses hyaline cartilage.

Detailed explanation-3: -Then your bronchi divide into branches that get smaller and smaller starting with: The lobar bronchi, which pass into a section (lobe) of your lungs. The segmental bronchi, which pass through a segment of each lobe. The bronchioles, which are the smallest segments of your bronchi.

Detailed explanation-4: -Answer and Explanation: The structures in order from largest to smallest is B. Bronchi, bronchioles, terminal bronchioles, respiratory bronchioles, alveoli.

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