respiratory system Flashcards
1
Q
importance of this system
A
- need oxygen to energize cells
- to remove carbon dioxide from cells
2
Q
breathing vs respiration
A
- breathing: movement of gas
- respiration: supplying oxygen to cells
3
Q
nasal cavity/nose
A
- air enters through nose
- nose hair cleans air
- sinuses warm air
- sinuses/mucus moisten air
- chemoreceptors detect scents
4
Q
pharynx
A
takes air from nose to trachea
5
Q
larynx
A
contains voice box/vocal chords
6
Q
epiglottis
A
switch between trachea and esophagus
7
Q
trachea
A
- windpipe
- rings of cartilage
- filter air
- has mucus (particles)
- pathway to bronchi
8
Q
bronchi
A
- two main branches of trachea
- lined with cilia (filter out foreign substances)
9
Q
bronchioles
A
- smaller pathways as bronchi divide
10
Q
alveoli
A
- fill with air when inhaling
- place of gas exchange
- diffusion occurs across alveoli membrane
11
Q
how does diffusion work
A
- oxygen diffuses from alveoli to capillaries
- CO2 from capillaries into alveoli and travels up until exhaled
12
Q
lungs
A
- two lungs
- surrounded by pleural membrane
- right has 3 lobes, left has 2 lobes
13
Q
diaphragm
A
- sheet of muscles
- at bottom of chest cavity
- seperate chest from abdominal area
14
Q
when does the diaphragm contract/relax
A
- contracts when oxygen breathed in (moves down)
- relaxes when CO2 exhaled (moves up)
15
Q
inspiration
A
- lungs move up and out
- diaphragm contracts and moves down
- pressure in lungs decreases so air comes in
