cardio respiratory system

Question 1

how does air enter the body

Answer 1

through the nose and mouth

Question 2

what is another word for ‘wind pipes’

Answer 2

trachea

Question 3

what surround the trachea and why?

Answer 3

rings of cartilage to prevent it collapsing

Question 4

where does the trachea send the air?

Answer 4

bronchus or bronchi

Question 5

what are the smaller airways that branch off the bronchi called?

Answer 5

bronchioles

Question 6

where does the bronchioles carry the air from and to?

Answer 6

bronchi to alveoli

Question 7

what are the alveoli?

Answer 7

tiny air sacs that are attached to the bronchioles

Question 8

what occurs in the alveoli?

Answer 8

exchange of oxygen and carbon dioxide

Question 9

characteristics of the artery

Answer 9

think muscular and elastic walls
small lumen
carry blood at high pressure
carry blood away from heart
usually carry oxygenated blood

Question 10

characteristics of veins

Answer 10

thin walls
large lumen
carry blood at low pressure
contain valves
mainly carry deoxygenated blood

Question 11

characteristics of capillaries

Answer 11

very thin walls
small lumen
link smaller arteries with small veins
allow gaseous exchange
carry blood at low pressure