ventilation and gas transport

Question 1

what are the inter coastal muscles

Answer 1

-external and internal inter coastal muscles
-muscles located between consecutive ribs

Question 2

what’s the function of the inter coastal muscles

Answer 2

-contract and relax during inhalation and exhalation altering volume of air in chest

Question 3

what are the phases of ventilation

Answer 3

-2 phases of ventilation
-inhalation- inspiration
-exhalation- expiration

Question 4

describe inhalation

Answer 4

-movement of air from atmosphere to lungs
-active phase of breathing
-external inter coastal muscles contract
-ribs move up and out
-diaphragm contracts and becomes flat
-volume increases
-lungs: expand
-oxygen to lungs

Question 5

describe exhalation

Answer 5

-passive phase
-external muscles relax
-moves down and in
-diaphragm relaxes
-volume: decreases
-lungs: compress