BLM 1-1 Functions of Respiratory System

Question 1

larynx (voicebox)

Answer 1

• contains vocal cords

- passage way for air between pharynx and trachea

Question 2

lungs

Answer 2

• paired cone shaped organ in the thoracic cavity
• right lung: three lobes, left lung: two lobes
• covered by pleura (serous membrane)
• contains alveoli

Question 3

nasal cavity

Answer 3

• space in which air is warmed, moistened, filtered

- narrow canals separated from one another by septum composed of bone and cartilage

Question 4

diaphragm

Answer 4

• large muscular sheet that contracts to increase thoraicic pressure
• separates thoracic cavity and abdominal cavity

Question 5

nostril

Answer 5

-air first enters body through nostril

Question 6

pharynx (throat)

Answer 6

• cross road leading to esophagus or trachea

- connects nasal and oral cavity to larynx

Question 7

bronchiole

Answer 7

-smaller, numerous branches leading to alveoli

Question 8

trachea (windpipe)

Answer 8

• tube w cartiaginous rings that allow air to pass to the bronchus -> bronchiole
• connect larynx to primary bronchi
• C shape cartilaginous face esophagus, expand when swallowing

Question 9

glottis

Answer 9

-slit within vocal chords

Question 10

vocal cords

Answer 10

• mucosal folds supported by elastic ligaments

- when air expelled past vocal chords through glottis, vocal chords vibrate, produce sound

Question 11

bronchus

Answer 11

-branch off the trachea leading to bronchioles

Question 12

epiglottis

Answer 12

• prevents food from enterring trachea

- when food swallowed, larynx moves upward against epiglottis