Download Respiratory System

Respiratory System
Lesson 6 vocabulary
trachea – the tube through which air moves
from your throat to your chest; the windpipe
bronchial tubes – two branches of the
trachea, which go into the lungs
alveoli – small, hollow air sacs inside your
lungs
inhalation – is the process
in which the air enters the
lungs
exhalation – is the process
in which the air leaves the
lungs
breathing – moving air in
and out of the lungs
diaphragm – is a muscle
that separates the chest
from the abdomen, helps
to also force air out of the
lungs
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1. Lesson 6 notes
1. Organs that
help you breathe
make up the
respiratory
system – draws
air into your
lungs, takes
oxygen from the
air for your body
to use, helps
remove carbon
dioxide
2. How does air travel to your lungs
– a. Air comes into your body through your nose
and mouth
– b. It then enters your throat (pharynx) to your
voice box (larynx)
– c. From this point it moves through a pipe called
the trachea, or windpipe
– d. The trachea is divided at the end into 2
branches called bronchial tubes or bronchi
– e. Air moves into your lungs
through these tubes, which
branch into smaller tubes
(bronchioles), which lead to
tiny air sacs called alveoli
– f. In the lungs (sponge like)
i. Air you breathe in fills up the
alveoli
ii. Oxygen passes from the alveoli
into the capillaries
iii. RBC in the capillaries pick up
the oxygen
iv. Your blood takes the oxygen to
the rest of your cells
– g. Deoxygenated blood
i. Blood delivers oxygen and picks up
carbon dioxide given off by your cells
ii. Carbon dioxide moves through the body
to the capillaries in the alveoli and into the
lungs
iii. It then leaves the body when you
breathe out
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3. The breathing process
a. Breathing – moving air in and out of the lungs
b. Breathing involves both inhalation and exhalation
c. Inhalation – is the process in which the air enters
the lungs
d. Exhalation – is the process in which the air leaves
the lungs
e. Inhalation occurs when the diaphragm contracts
and the rib cage expands
f. Diaphragm – is a muscle that separates the chest
from the abdomen, helps to also force air out of the
lungs
4. How does your body
clean the air you breathe?
– a. Hairs in your nose being
the cleaning by screening out
some particles
– b. Sticky mucus traps more
i. this lines your nasal passages
and the walls of your trachea
and bronchial tubes
ii. it may trap germs and other
harmful matter... like pollen
– c. Trachea and bronchial tubes have
tiny hairs called cilia
i. Cilia wave quickly back and forth and
push mucus that has trapped dirt and dust
up toward your throat
– d. When you swallow, much of the
mucus passes into the digestive
system
Review Lesson 6
What does your respiratory system
do?
What is the job of the alveoli?
How is the air you breathe cleaned
by the respiratory system?