The respiratory system:

Question 1

Main functions of the resp. system:

Answer 1

• Supply body with continuous supply of oxygen

- And to remove CO2 produced by cells via respiration

Question 2

4 Processes involved in respiration:

Answer 2

Pulmonary ventilation: Movement of air in and out of lungs
External respiration: Gas exchange between blood and air
Transport of respiratory gases: between lungs and cells
Internal respiration: Gas exchange between blood and cells

Question 3

Respiratory system made up of:

Answer 3

1. Tubes by which air reaches the lungs

2. Respiratory surfaces (alveoli)

Question 4

Respiratory organs:

Answer 4

1. Air enters the respiratory system via the nose and then passes
   through the nasal cavity.
2. Linking with the nasal cavity are paranasal sinuses.
3. From there, the air goes into the pharynx (pipe at back of
   throat) and then into the larynx and trachea.
4. Then passes into the bronchi and their smaller branches (in the
   lungs) and then ultimately into the alveoli.

Question 5

Classifications of airways:

Answer 5

Upper airways and lower airways

Question 6

Upper airways:

Answer 6

> Nose
Pharynx
Associated structures.

Question 7

Lower airways:

Answer 7

> Larynx
Trachea
Bronchi
Lungs

Question 8

Divided into:

Answer 8

Conducting zone:

Respiratory zone:

Question 9

Conducting zone:

Answer 9

> Respiratory passageways that convey air

> Filter, humidify and warm incoming air

Question 10

Respiratory zone:

Answer 10

> Site of gas exchange in lungs

> Includes respiratory bronchioles, alveolar ducts and alveolar sacs.