Structure and Function

1. RESPIRATORY SYSTEM

3. The Respiratory System
Systems Working Together
What happens during cellular respiration and how do
body systems work together to provide cells with
materials they need?

4. What is Human Respiration?
 The human respiratory system allows one to
obtain oxygen and eliminate carbon dioxide.
 Breathing consists of two phases, inspiration
and expiration
 Inspiration- the process of taking in air
(O2)
 Expiration- the process of blowing out air
(CO2)

5. Structures of the
Respiratory System
Particles in the air are
filtered out as the air
moves through the
respiratory system.
What does each part
of the respiratory
system do?
The Respiratory System

6. Organs in the Respiratory System
STRUCTURE FUNCTION
nose / nasal cavity
warms, moistens, & filters air as it is
inhaled
pharynx (throat) passageway for air, leads to trachea
larynx
the voice box, where vocal chords are
located
trachea (windpipe)
keeps the windpipe "open"
trachea is lined with fine hairs called
cilia which filter air before it reaches the
lungs
bronchi
two branches at the end of the trachea,
each lead to a lung
bronchioles
a network of smaller branches leading from
the bronchi into the lung tissue &
ultimately to air sacs
alveoli
the functional respiratory units in the lung
where gases are exchanged

7. The Respiratory System

9. The Respiratory System
The Breathing Process
When you inhale, air is pulled into your lungs. When you exhale, air is forced
out. What happens to your muscles when you breathe?
:
Task 1: The path of the air

10. BREATHING : Answer Task 1

11. First aid : Heimlich

12. Gas Exchange
Gases move across the
thin walls of both alveoli
and capillaries.
The Respiratory System