The respiratory system brings air into the body through the nose, which filters dust. The windpipe branches into air tubes that lead to the lungs. In the lungs, the air tubes branch into smaller tubes called air sacs where gas exchange occurs. During breathing, oxygen from the inhaled air enters the bloodstream in the lungs while carbon dioxide moves from the blood into the exhaled air. The respiratory system carries out functions like sighing, yawning, coughing, sneezing, laughing, and crying through movements of the diaphragm and other muscles.

1. RESPIRATORY SYSTEM
PRIMARY 5
GCSCC

2. AIR CONTAINS DIFFERENT TYPES OF GASES
- Oxygen is the gas
needed by living
things to stay
alive.
- Carbon dioxide is
the gas produced
by living things
when they carry
out their activities.

3. Parts of Respiratory System
Nose:
Air enters our body through the nose and the
hair in the nostrils remove dust.

4. It connects the nose to the air tubes.
When we breathe in, air travels from the nose
through the windpipe to the air tubes.
WINDPIPE

5. AIR TUBES
The windpipe branches into two air tubes and
each air tube leads to one lung.

6. LUNGS
The air tubes that lead to the lungs branch
further into smaller tubes. These tubes end in
tiny balloon-like structures called air sacs.

7. AIR SACS
- Gas exchange takes place
here.
- The air sacs are surrounded by
tiny blood vessels.

9. What happens during breathing?
- The air we breathe in is called inhaled/inspired
air. (more oxygen, O2)
- The air we breathe out is exhaled/expired air.
(more carbon dioxide, CO2)

10. Diaphragm is this sheets of muscle.

11. What happens to the
oxygen we breathe
in?

12. OUR ACTIVITIES AND THE REPIRATION
-Sighing
a long,deep inspiration
followed by a short ,
large expiration

13. OUR ACTIVITIES AND THE RESPIRATION
-
Yawning
The entrance of the
air to the open mouth
instead through the
nose.

14. OUR ACTIVITIES AND THE RESPIRATION
-
Hiccoughing
It is caused by the
contractions of the
Diaphragm.It is the
sudden movement of the
Diaphragm.

15. OUR ACTIVITIES AND THE RESPIRATION
-Coughing
It is s full inspiration
followed by rapid
expiration,often
violent.

16. OUR ACTIVITIES AND THE RESPIRATION
-
Sneezing
which smilar to
coughing,except that
the expelled air is sent
through the nose.

17. OUR ACTIVITIES AND THE
REPIRATION
-Laughing & Crying
It is are physiologically much
alike,and often pass into
one another under
emotional
Stress.
OUR ACTIVITIES AND THE RESPIRATION