Which of the following structures is included in the respiratory portion of the respiratory tract?

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True

Each pleural cavity actually represents a potential space rather than an open chamber, for the parietal and visceral layers are usually in close contact.

elastic fibers

The capillaries surrounding each alveolus are surrounded by a network of ________.

main bronchi

The carina is an internal ridge that lies between the entrances to the ________.

type II cell

The respiratory membrane consists of all elements, except ________.

nasopharynx

The upper respiratory system consists of the nose, nasal cavity, paranasal sinuses, and ________.

nasopharynx The nasopharynx is part of the upper respiratory system.

The upper respiratory system includes the __________.

cartilage

The walls of the main, lobar, and segmental bronchi contain progressively lesser amounts of ________.

respiratory bronchioles

Which are the thinnest and most delicate branches of the bronchial tree?

type II alveolar cells

Which cell type produces surfactant?

temporal

Which of the following bones does NOT contain a paranasal sinus?

The right lung has three lobes.

Which of the following correctly describes the lungs?

alveoli

Which of the following structures is included in the respiratory portion of the respiratory tract?

vestibular folds

Which structure(s) is/are known as false vocal cords?

submucosa

Within the trachea, the ________ contains mucous glands that secrete mucus onto the epithelial surface through secretory ducts.


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