Respiration Flashcards
What is respiration
The process of breathing in oxygen breathing out carbon dioxide
Seven life processes
Movement
Respiration
Sensitivity
Growth
Reproduction
Excretion
Nutrition
Trachea
Major airway connects pharynx and larynx to lungs
Bronchi
Plural of bronchus
Bronchioles
Small branching tubes into which the bronchi subdivide
Alveoli
Tiny air sacs
Gas exchanged during breathing here
What happens when we breathe in
Inhalation
Intercostal muscles contract
Ribs move up
Diaphragm muscles contract
Diaphragm lowers
Volume of chest increases
Pressure in the chest decreases
Air pressure in lungs is lower than atmospheric pressure
Air rushes in lungs
What happens when we breathe out
Exhalation
Intercostal muscles relax
Ribs move down
Diaphragm muscles relax
Diaphragm raises
Volume of chest decreases
Pressure in the chest increases
Air pressure in lungs is greater than atmospheric pressure
Air rushes out of the lungs
What is the level of oxygen and CO2 in inhaled air
21% oxygen
0.04% CO2
What is the level of oxygen and CO2 in exhaled air
16.4% oxygen
4.4% CO2
Why does exhaled air have less oxygen but more carbon dioxide than inhaled air
Because our cells use oxygen from the inhaled air to release energy and give out carbon dioxide as a byproduct
;our body uses the oxygen and gets rid of CO2 )
Bell jar limitations
No muscles attached to ribs so they cannot move up and down or in and out. It’s a single bag with no tubes with terminal ravioli so the balloon doesn’t fill space or stick to the rib cage.
Bell jar, similarities
The rib cage is approximately the same shape. The balloon lung can inflate a deflate, the diaphragm stormed up position matches the position when air is exhaled, the windpipe is wide, conducting air.
