Download Respiratory System

What are the different parts of the respiratory system
and what are their functions?
Exit Ticket
We need to breathe air to stay alive.
Wow, the respiratory system sure has an
important job! What are some factors
that influence how well the respiratory
system works? Discuss which influences
are harmful and which are helpful. What
can you do to keep your respiratory
system healthy?
 The respiratory system moves oxygen from
the outside environment into the body and
removes carbon dioxide from the body.
 Oxygen is needed for the energy releasing
chemical reactions that take place in cells.
 Like fire needs oxygen to burn, your cells
cannot ‘burn’ enough fuel to keep you alive
without oxygen.
1. Nasal Passage: warms air, has a mucus
lining and cilia (hairs) to filter out
particles.
2. Mouth: plan ‘B’ for breathing
3. Pharynx: leads from nasal passage and
mouth to the larynx.
4. Larynx: next passageway for air. The
voice box is located here.
5. Voice box: contains vocal cords which
are thin bands of tissue that vibrate
when exhaled air rushes past them;
enables you to make sounds.
6. Trachea: about 4.5 inches long;
surrounded by rings of cartilage to
keep it open so air can travel through it
freely. Lined with cilia.
 7. bronchus: tubes that branch from
trachea; one to each lung and are lined
with cilia.
8. bronchiole: each bronchi divides and
subdivides like branches of a tree.
Air is now moistened, filtered, and body temperature.
Respiratory System Movie
 http://kidshealth.org/kid/htbw/RSmovie.html
9. Alveoli:
tiny air sacs where gas
exchange takes place between the
respiratory system and the circulatory
system.
(Remember? Oxygen low blood from the heart goes to the lungs to drop off
CO2 and pick up oxygen…..leaves the lungs as oxygen high blood.)
10. Diaphragm: large sheet-like muscle
that contracts when you breath in to
expand lungs and relaxes when you
breath out compressing the lungs to
force carbon dioxide and other waste
products out.
Respiratory System Movie
 http://kidshealth.org/kid/htbw/RSmovie.html
Measuring your Lung Capacity
Can you think of a way
that we could measure
the amount of air our
lungs can hold?