Process of breathing Flashcards
where is the thorax
the top part of the body
What muscles separates the top part of the body from the lower part
The diaphragm
what runs in between the ribs
The intercostal muscles
what protects the lungs
The rib cage
where does the air that you breath in go through
The trachea
what is the name of the tube the trachea splits into
bronchi
- each bronchi goes to each lung
- each individual tube is called the bronchus
the bronchioles end at small bags called the _____
Alveoli
what are the smaller tubes of the bronchi called
Bronchioles
what happens in the alveoli
gas exchange
what happens in your lungs
- you get oxygen for respiration
- get rid of carbon dioxide out of your blood stream
- this all happens when you breathe in and out
what happens when you breath in (ventilation/inhalation)
- external intercoastal muscles contract internal relax
- ribs move up and out
- Diaphragm contracts (flattens in shape)
- chest volume increases (drawing air in)
- Air pressure inside thorax lower
- air movement in
what happens when you breath out (exhalation)
- external intercostal muscles relax internal contract
- Ribs move down and in
- Diaphragm relaxes into a dome shape
- Chest volume decreases.
- Air pressure inside thorax higher
- Air movement out
what happens in the alveoli
- This is where gas exchange with the blood occurs
- oxygen diffuses into the blood from the alveoli
- Carbon dioxide diffuses out of the blood into the alveoli
what is the pleural cavity
- contains the pleural membranes
- pleural fluid lubricates membrane
- sperates thorax from lungs
- creates air tight seal (continuous envelope around lungs)
what two movements bring out ventilation
- Ribs (via intercostal muscles)
- Diaphragm
