Respiratory System 1 Flashcards
Respiratory system function
To recondition the blood to maintain homeostasis of plasma
Side effect of the function of the respiratory system
Loss of fluid and heat
What is cellular respiration
The use of O2 by cells to make ATP
What is external respiration?
The exchange of O2 & CO2 btw the organism and its external environment
What are the 5 steps of respiration
- Exchange 1
- Exchange 2
- Transport of gases in blood circulation
- Exchange 3
- Cellular respiration in tissues
Exchange 1 is also known as
Ventilation (breathing)
Exchange 1 is btw the ___________ and the ___________
Btw the atmosphere & lungs
Exchange 2 is btw the __________ & the __________
Btw the lungs and the blood
Exchange 3 is btw is btw the ____________ & the _____________
Btw the blood & the cells
Pulmonary circulation pressure
- low pressure
- 25/8 mmHg
Pulmonary circulation resistance
Low resistance
Pulmonary circulation flow rate
- high flow rate
- 5L/min
________L/500L of blood is in the capillaries
75L of blood is in the capillaries
What generates movement in the respiratory system
The skeleto-muscular pump generates movement
What is the ‘medium’ and what are the pathways in the respiratory system
- medium = air
- pathway = airways
The upper respiratory tract consists of
- mouth
- nasal cavity
- pharynx
- larynx
The lower respiratory tract is also known as the ________________ because …
Aka the thoracic portion because it is enclosed by the thorax
The lower respiratory tract consists of
- trachea
- 2 primary bronchi (1 ‘bronchus’ to each lung)
- their branches
- lungs
Thoracic cage
The thorax is bounded by the bones of the spine and rib cage and diaphragm (forms floor)
What is the primary airway?
The trachea is the primary airway
Air pathway
- mouth/nasal cavity
- pharynx
- larynx
- trachea
- primary bronchi
- bronchioles
- alveoli
What is the function of the nasal cavity?
Traps airborne particles by way of nasal hairs and mucus
What is the pharynx
Throat
What is the larynx and what does it contain
The “voice box”
Contains vocal cords
What are the vocal cords
Connective tissue bands that vibrate & tighten to create sound when air moves past them
What is the trachea also known as
The windpipe
What is the trachea?
A semiflexible tube held open by 15-20 c-shaped cartilage rings
Where does the trachea extend?
The trachea extends down the the thorax where is branches into primary bronchi
