Lab practical -respiratory

Question 1

respiratory system major function

Answer 1

O2 supply and CO2 excretion
4 events that need to take place:
1. pulmonary respiration
2. external respiration
3. transport of gases
4. internal respiration

Question 2

organs make up 2 zones

Answer 2

1. respiratory (gas exchange) zone

2. conducting zone (bring air to the respiratory zone)

Question 3

conducting zone (bring air to the respiratory zone)

Answer 3

• nose
• pharynx
• larynx
• trachea
• primary, secondary, tertiary bronchi
• bronchioles
• terminal bronchioles

Question 4

respiratory (gas exchange) zone

Answer 4

• respiratory bronchioles
• alveolar ducts
• alveolar sacs

Question 5

nose

Answer 5

• continuous into the nasopharynx thru nasal cavities
• provide resonance chambers for speech and produce mucus
• often a site of inflammation

Question 6

pharynx (throat)

Answer 6

the nasal cavity opens into the pharynx thru the internal nares
3 regions:
1. nasopharynx- should serve only as air passage
2. oropharynx- common passage for food & air
3. Laryngopharynx- a common passageway for food & air

Question 7

larynx

Answer 7

-the voice box
-passage for air only
3 major functions:
1. to provide an open airway
2. to serve as the “switching point” digesting food to the esophagus and air into the trachea
3. to serve as the voice box

Question 8

major 3 larynx cartilages

Answer 8

1. thyroid
2. crichoid
3. epiglottis

Question 9

epiglottis

Answer 9

-the “gaurdian of the airway,” sealing off the glottis lining , swallowing so that food doesn’t enter the respiratory passageways

Question 10

trachea

Answer 10

-windpipe

Question 11

conducting zone bronchi

Answer 11

-Primary(2); secondary (3R, 2L), Tertiary (10R, 8L)

+ numerous bronchioles

Question 12

respiratory zone

Answer 12

respiratory bronchioles (contain air sack outpocketings)

• alveolar ducts
• alveolar sac
• alveoli

Question 13

lungs

Answer 13

• right lung has 3 lobes and 10 bronchopulmonary segments

- the left lung has 2 lobes and 8 bronchopulmonary segments

Question 14

pleurae

Answer 14

• pleura are the serous membrane surrounding the lungs

- each lung is enclosed in its own visceral and parietal pleura