Mechanics Of Breathing Flashcards
Define respiration
The process involved in supplying the body with oxygen and disposing of carbon dioxide
How is oxygen transported in the blood
- Combines with haemoglobin creating oxyhaemoglobin
- Dissolved in blood plasma
How is carbon dioxide transported in the blood
- Combined with haemoglobin creating carbominohaemoglobin
- Dissolved by blood plasma
- Dissolved in water as carbonic acid
Describe the inspiration aspect of mechanics of breathing at rest
.Inspiration is active part of mechanics of breathing
. Diaphragm and external intercostals contract
. Rib cage moves up and out
. Volume of thoracic cavity increases
. Pressure of air inside lungs decreases
. Air rushes into lungs moving from high pressure to low pressure
Describe how expiration works with mechanics of breathing at rest
. Expiration=passive
. Diaphragm and external intercostals relax
. Rib cage moves down and in
. Volume of thoracic cavity decreases
. Pressure of air inside lungs increases
. Air rushes out of lungs from high pressure to low pressure
Where does external respiration take place
At the lungs
Where does external respiration happen between
Between alveoli and blood
What is the movement of oxygen during external respiration
Alveoli to the blood
What is the movement of carbon dioxide during external respiration
From the blood to the alveoli
How does o2 move during external respiration
There is a higher partial pressure of oxygen in alveoli than the blood. So, oxygen travels down the diffusion gradient into the blood
Where does internal respiration take place
At the muscles
Where does internal respiration happen, between what
Blood and muscles
Where does oxygen move during internal respiration
From blood to muscle
Where does carbon dioxide move during internal respiration
From the muscle to the blood
How does oxygen move during internal respiration
There’s a higher partial pressure of oxygen in the blood than the muscle. So, oxygen travels down the diffusion gradient into the muscle
