Transcript Respiratory_System_Notes

Respiratory System Notes
Notebook page
1. Respiration
• Moves oxygen (O2 )from
the outside environment
into the body
• Removes carbon dioxide
(CO2 ) and water (H2O )
from the body.
• Respiration- the process
in which oxygen and
glucose undergo a
complex series of
chemical reactions inside
cells.
Fueling your Cells
2. Path of Air: As air travels from the outside
environment to the lungs, it passes through the following
• Nose- inhales air
• Pharynx- throat
• Larynx- voice box,
contains vocal cords
• Trachea- windpipe
• Bronchi- trachea splits
into 2 tubes
• Lungs- contains alveoli
(air sacs)
• Alveoli- place where CO2
is exchanged for O2.
3. Gas Exchange
• After air enters an
alveolus, oxygen passes
through the wall of the
alveolus
• Then through the
capillary wall into the
blood.
• Carbon dioxide and
water then pass from the
blood into the alveoli.
4. How you Breathe
• When you breathe, the
actions of your rib
muscles and diaphragm
expand or contract your
chest. As a result, air
flows in or out.
• Diaphragm- a large
dome-shaped muscle
located at the bottom of
the rib cage
• Works with the rib
muscles to suck in air.
The Breathing Process
5. Breathing and Speaking
• Two vocal cords,
folds of connective
tissue that produce
your voice, stretch
across the opening of
the larynx.
• Air moving over the
vocal cords causes
them to vibrate and
produce sound.
Complete on page 204
• Create a flow chart showing how we
breathe.
• Use your notes or book page 573 to help
you.
• Use color!