Middle school science topic about Breathing-Respiration and The Human Respiratory System.

1. Breathing-Respiration
and
Human Respiratory System
Middle School Science Topic
Genius Science

2. Levels of Organization
Remember, the human body is organized in several levels.
Cells – the basic unit of life
Tissues – clusters of cells performing a similar function
Organs – made of tissues that perform one specific
function
Organ Systems – groups of organs that perform a
specific purpose in the human body

3. The Human Body Systems
The major human body systems are as follows:
-- digestive system
-- respiratory system
-- nervous system
-- circulatory system
-- excretory system -- skeletal system
-- muscular system
-- endocrine system -- reproductive system
-- immune system

4. Breathing is the physical process
where we inhale and exhale air in
and out of our lungs.
Breathing brings in air Oxygen and
removes Carbon di-oxide from our
body.
Breathing

5. Respiration is a chemical reaction where oxygen
is used to breakdown glucose(food) in order to
generate energy in the cell (mitochondria).
Word equation of respiration:
glucose + oxygen → carbon dioxide + water + energy
Respiration

6. Breathing and respiration are not same and
there are some differences between the two.
Breathing Respiration
Breathing definition Respiration definition
Breathing takes place in the lungs. Respiration takes place in cells.
Breathing is a physical process. Respiration is a chemical process.
No energy is released during the
process.
Energy is released during the
process.

7. The Respiratory System
Purpose: to provide the body with a fresh supply of oxygen
for respiration and remove the waste product carbon dioxide.

8. Major Organs and Their Functions
1. Nose – entry and exit point for air
2. Voicebox (Larynx) – as air passes through
larynx, we speak.
3. Trachea – the “windpipe”, or what connects to
our lungs.
The ciliated cells are located across the inner surface of
trachea and bronchus, facilitate the movement of mucus.

9. 4. Bronchi/Bronchus– the two large passageways that lead
from the trachea to our lungs (one for each lung).
5. Bronchioles -- the bronchi are further subdivided into
bronchioles.

10. 6. Alveoli/Alveolus-- eventually, the further subdivisions of
bronchioles lead to tiny air sacs called alveoli.
-- alveoli are in clusters, like grapes.
-- capillaries surrounding each alveolus is where
the exchange of gases with the blood occurs.
7.Lung- Main organ of this system.
8. Diaphragm is the sheet muscle that causes us to breath

11. Image of the Respiratory System

12. Structure Function
Nasal cavity Air is warmed and filtered as it enters the body.
Trachea Brings air into the lungs.
Bronchus Branches of the trachea to bring air into the lungs.
Bronchiole Branch off the bronchi.
Alveoli Small air sacs that are the site of gas exchange.
Lung Organ where gas exchange occurs.
Ribs Protect internal soft organs (lungs, heart liver etc).
Diaphragm Sheet of muscle below the ribs that aids breathing.

13. 1. Asthma. ...
2. Chronic bronchitis. ...
3. Lung cancer. ...
4. Pneumonia. ...
5. COVID 19 side effect
6. Chronic obstructive pulmonary
disease (COPD) ...
Common diseases of RS

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