Respiration

Question 1

what is the respiratory system composed of?

Answer 1

airway passages, lungs and the associated blood vessels

Question 2

what is the purpose of the respiratory system?

Answer 2

is to provide oxygen and carbon dioxide exchange between air and blood

Question 3

what is ventilation?

Answer 3

is the movement of air from the atmosphere into and out of the lungs

Question 4

how does ventilation work?

Answer 4

• air must be taken in through the upper airway passages comprising the nose, nasal passages, mouth, pharynx and larynx
• the air then proceeds from there into the lower airway consisting of the trachea, the bronchi an bronchioles of the lungs

Question 5

what is inspiration?

Answer 5

process of taking air in

Question 6

what is perfusion?

Answer 6

is the movement of blood through the lungs

Question 7

what is diffusion?

Answer 7

is the movement of gases between the roughly 1 million alveoli or air filled sacs within the lungs and the capillaries that supply the alveoli

Question 8

how does diffusion work?

Answer 8

• gases move across the alveolar capillary membrane
• oxygen moves from the air in the alveoli into the blood flowing through the pulmonary capillaries
• carbon dioxide passes from the blood into alveoli
• completing the respiration process, the carbon dioxide is expelled through expiration

Question 9

if respiration is impeded, what happens with gas exchange?

Answer 9

IT DOES NOT OCCUR
- the body’s supply oxygen becomes insufficient for its needs and carbon dioxide cannot be expelled from the blood