Respiratory Flashcards
Some functions of respiration:
- route for heat elimination/water loss
- Co2 + O2 exchange
- humidification of inspired air
- defence against pathogens
- smell and taste
4 steps or respiration:
- breathing/ventilation
- O2 and Co2 oxygen exchange between alveoli and blood
- O2 and Co2 transported to tissues in the blood by circulation
- O2 and Co2 exchange between blood and capillaries
What are the 2 parts of the respiratory system?
- Conducting system
- Exchange surfaces
conducting system
Large diameter, no gases exchange
Exchange surfaces:
- decrease in diameter but increased surface area
- Gas exchange in surfaces of respiratory bronchioles and alveoli
Ficks law of diffusion:
respiratory gas exchange occurs by diffusion. high to low pressure. lungs to blood.
alveoli
Line the respiratory surfaces surrounded by capillaries allowing easy diffusion
Pleura
separates the 2 lungs, lungs sit in the pleural cavity
4 types of pressure in the respiratory tract:
- atmospheric pressure
- intrapulmonary pressure
- intrapleural pressure
- transmural pressure
What does the diaphragm do?
lowers to increase volume of thoracic cavity, and create a pressure gradient for air flow
Tidal volume:
amount of air the MOVES IN AND OUT OF THE LUNGS DURING QUIET BREATHING
intraplueral pressure
- 756mmHg
- higher pressure in lungs allows lungs to sit against the rib cage
pneumothorax
a puncture in the thoracic cavity
Normal BPM:
12-18bpm
500ml per breath
6-8L per min
Normal BPM:
12-18bpm
500ml per breath
6-8L per min
