functions of respiratory system
- Created by: Chantelle..
- Created on: 09-01-19 17:17
View mindmap
- functions of the respiratory system
- average breathing rate
- 12-15 breaths per minute
- breathing dependent on pressure changes in the chest cavity
- inspiration
- breathing in
- intercostal muscles contract
- pulling ribcage up and out
- diaphragm contracts
- pulling outwards
- allows lungs to expand
- pressure in thoracic cavity falls
- expiration
- relaxation of the intercostal muscles
- breathing out
- diaphragm goes inward and downward
- chest cavity goes out and down
- pressure in the lungs rises
- gaseous exchange
- occurs when there is a difference of pressure in the semi permeable membrane
- moves by diffusion
- from higher concentration
- to lower concentration
- from higher concentration
- carbon dioxide diffuses from the blood into alveoli
- oxygen diffuses from the alveoli into the bloodstream
- average breathing rate
Comments
No comments have yet been made