Download 2 1 Respiratory System

ACTIVITY 1: How do your Ribs
move?
 Inhale at your maximum and measure the
circumference of your chest;
 Exhale at your maximum and measure the
circumference of your chest;
 Write a report on the paper given and get a conclusion.
WHY IS OXYGEN SO IMPORTANT?
NUTRIENTS + O2 = H2O + CO2 + ENERGY
WITHOUT OXYGEN NO LIVING THINGS ARE ABLE TO USE
THE NUTRIENTS OBTAINED THROUGH FOOD!
What gases compose the air we
breathe?
Exchanging O2 and CO2
How does O2 get to our cells?
O2 and other gases get to our
body when we inhale, then
red blood cells transport the
molecules throughout the
body.
Why can’t we keep CO2 inside our
bodies?
CO2 is a toxic gas.
ACTIVITY 2: Red Blood Cells and
Gas Transportation
 The Picture shows a Red Blood Cell in two different stages,
the “young” and the “mature”;
 What can you observe and conclude?
 Use your Science Report to write down your observations
and conclusions.
Tip: Young cells present
all the organelles but
when they go mature
these organelles are all
digested leaving just na
empty space inside the
cell.
HOW DOES AIR MOVE IN AND OUT
OF OUR LUNGS?
Especialized muscles that help
us
inhale
and
exhale:
diaphragm, abdominal and
pectoral muscles.
ACTIVITY 3: The Lung Model
 Chapter 2, Page 39
 INVESTIGATE: LUNGS


Develop the model and answer
the two questions on the Science
Report;
Develop the Challenge (list of
materials and diagram must be
on the report).
Cellular Respiration
 Inside your cells, a process called Cellular
Respiration uses O2 in chemical reactions
that release energy.
NUTRIENTS + O2 = H2O + CO2 + ENERGY
(sugars)
TOXIC WASTE !
Where does the reaction happen?
Mythocondria
Structures in the Respiratory
System
 The respiratory system is made up of many
structures;
 These structures function together;
 They move air in and out your body (keep out
harmful material!)
Nose
 Inside your nose, tiny
hairs called cilia filter
dirt and other
particles;
 Mucus also help
trapping particles;
 Nasal cavity warms
and moistures air.
Throat and Trachea
 Right after the nasal
cavity air moves down
your throat toward a
tubelike structure
called Trachea;
 A structure called
Epiglottis keeps food
from entering your
trachea.
Esophagus
(food)
(air)
Lungs
Lungs
 Air moves into the lungs
through the bronchial
tubes (bronchi);
 Branchial tubes branch
throughout the lungs into
smaller and smaller tubes;
 At the ends of the smallest
tubes, air enters tiny air
sacs called alveoli.
ALVEOLI  GAS EXCHANGE!
Ribs
 The rib cage encloses a
space called the
thoracic cavity;
 This cage is flexible,
which makes room for
the lungs to expand
(O2 intake);
Diaphragm
 The diaphragm is a muscle that separates the thoracic
from the abdominal cavity;
 It plays a vital role in the respiratory system!
REVIEW...
FOR NEXT WEEK...
 Summarize pages 42 and 43;
 Answer 2.1 Review (from 1 to
6)