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Flashcards in Respiratory System Deck (25)
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1

Branch of a respiratory bronchiole around which alveoli and alveolar sacs are arranged.

Alveolar duct

2

Highly phagocytic cell found in the alveolar walls of the lungs. Also called a dust cell.

Alveolar macrophage

3

A cluster of alveoli that share a common opening.

Alveolar sac

4

Neuron capable of responding to changes in blood, air, or fluid pressure.

Baroreceptor

5

The trachea, bronchi, and their branching structures up to and including the terminal bronchioles.

Bronchial tree

6

Branch of a tertiary bronchus further dividing into terminal bronchioles (distributed to lobules of the lung), which divide into respiratory bronchioles (distributed to alveolar sacs).

Bronchiole

7

Sensory receptor that detects the presence of a specific chemical.

Chemoreceptors

8

A large, leaf-shaped piece of cartilage lying on top of the larynx, attached to the thyroid cartilage; its unattached portion is free to move up and down to cover the glottis (vocal folds and rima glottidis) during swallowing.

Epiglottis

9

Breathing out; expelling air from the lungs into the atmosphere.

Exhalation

10

Breathing out; expelling air from the lungs into the atmosphere.

External respiration

11

Lack of adequate oxygen at the tissue level.

Hypoxia

12

The act of drawing air into the lungs. Also called inspiration.

Inhalation

13

The exchange of respiratory gases between blood and body cells. Also called tissue respiration or systemic gas exchange.

Internal respiration

14

The inferior portion of the pharynx, extending downward from the level of the hyoid bone that divides posteriorly into the esophagus and anteriorly into the larynx. Also called the hypopharynx.

Laryngopharynx

15

The superior portion of the pharynx, lying posterior to the nose and extending inferiorly to the soft palate.

Nasopharynx

16

The voice box, a short passageway that connects the pharynx with the trachea

Larynx

17

The intermediate portion of the pharynx, lying posterior to the mouth and extending from the soft palate to the hyoid bone.

Oropharynx

18

Hemoglobin combined with oxygen.

Oxyhemoglobin

19

The throat; a tube that starts at the internal nares and runs partway down the neck, where it opens into the esophagus posteriorly and the larynx anteriorly.

Pharynx

20

Small potential space between the visceral and parietal pleurae.

Pleural cavity

21

The inflow (inhalation) and outflow (exhalation) of air between the atmosphere and the lungs. Also called breathing.

Pulmonary ventilation

22

Complex mixture of phospholipids and lipoproteins, produced by type II alveolar (septal) cells in the lungs, that decreases surface tension.

Surfactant

23

Tubular air passageway extending from the larynx to the fifth thoracic vertebra. Also called the windpipe.

Trachea

24

Pair of mucous membrane folds below the ventricular folds that function in voice production.

Vocal folds

25

A small hollow or cavity; an air sac in the lungs; milk-secreting portion of a mammary gland.

Alveolus