BIOS 254 Lab 8 HW - –Answer thyroid cartilage 2. The epiglottis f...

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BIOS 254 Lab 8 HW

• The is the largest and most prominent of the laryngeal carti- lages.

–Answer thyroid cartilage

• The epiglottis forms a lid over the larynx when we swallow food

–Answer it closes off the respiratory passageway to incoming food or drink.–Answer True

• The lining of the trachea is pseudostratified ciliated , which

pro- pels dust particles, bacteria, and other debris away from the lungs.–Answer columnar epithelium

• Fissures divide the lungs into lobes, three on the right and __on the left.

–Answer two

• The major role of the respiratory system is to .

–Answer supply the body with oxygen and dispose of carbon dioxide

• All but the smallest branches of the bronchial tree have cartilaginous rein- forcements in

their walls.–Answer True

• The upper respiratory structures include the nose, the larynx, and the

.–Answer pharynx

• Air flows from the larynx to the trachea, and then enters the . 1 / 2

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–Answer left and right main bronchi

• , tiny balloonlike structures, are composed of a single thin layer of squamous

epithelium. They are the main structural and functional units of the lung and the actual sites of gas exchange.–Answer Alveoli

• Four processes—pulmonary ventilation, external respiration, transport of respiratory gases,

and internal respiration—must all occur in order for the respiratory system to function fully.–Answer True

• The function of the respiratory system is to .

–Answer supply the body with oxygen and eliminate carbon dioxide

• Ventilation is .

–Answer the movement of air into and out of the lungs

• This portion of the upper respiratory system serves only as an air passage- way.

–Answer nasopharynx

• Speech occurs when air is moved through this passageway between the

.–Answer vocal folds

• The trachea divides into bronchi that lead to the lungs.

–Answer 2

• The boundary between conducting zone and respiratory zone structures occurs at the

.–Answer

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