Download Respiratory System Period 3 - Mercer Island School District

Respiratory System Period 3
Ana, Maya, Carter
System Function
The primary function is to
supply oxygen to the
blood cells throughout the
body. The body does this
through breathing,
inhaling oxygen and
exhaling carbon dioxide.
The Nasal Passage & The Oral Cavity
The function of the nasal
cavity is to warm, moisturize,
and filter air entering the
body before it reaches the
lungs. Hairs and mucus
lining the nasal cavity help to
trap dust, mold, pollen and
other environmental
contaminants before they
can reach the inner portions
of the body.
The Lungs
The lungs' main function is to
help oxygen from the air we
breathe enter the red cells in
the blood. Red blood cells then
carry oxygen around the body
to be used in the cells found in
our body. The lungs also help
the body to get rid of CO2 gas
when we breathe out.
The Bronchi & Bronchioles
Bronchi are the main passageway into the
lungs. When someone takes a breath through
their nose or mouth, the air travels into the
larynx. The bronchi become smaller the
closer they get to the lung tissue and are then
considered bronchioles. These passageways
then evolve into tiny air sacs called alveoli,
which is the site of oxygen and carbon
dioxide exchange in the respiratory system.
The Diaphragm
The diaphragm is the main
muscle of respiration.
Contraction of the diaphragm
muscle expands the lungs
during inspiration when one
is breathing air in.
Breathing Process
The breaking process is controlled by the
diaphragm. When the diaphragm
contracts the chest expands and the
lungs fill up with air. Then the diaphragm
relaxes and pushes the air out of the
lungs.
Homeostasis
The respiratory system
maintain homeostasis in the
body through gas exchange.
The respiratory system cycles
in new oxygen for cellular
respiration and releases CO2,
a waste product. This
maintains the balance of gases
in our body.
Asthma
A condition in which a person's airways become inflamed, narrow and swell, and
produce extra mucus, which makes it difficult to breathe.
Symptoms: difficulty breathing, chest pain, cough, and wheezing, which can occur
at night, during exercise, can be chronic.
Treatments: Rescue inhaler, controller inhaler, and longer-lasting inhaler for
chronic symptoms.
Causes: Environmental factors (smoking or airborne allergens) and genetic
factors.
Tuberculosis
A potentially serious and contagious infectious bacterial disease that affects the
lungs.
Symptoms: Cough, sometimes with blood, weight loss, night sweats, and fever.
Treatments: Antibiotics to stop the growth of bacteria.
Causes: Bacteria in a person's lungs spread through the air.
Respiratory and Circulatory System
The respiratory system brings oxygen to
the lungs which the circulatory system
uses to pump blood throughout the body.
Oxygen from the lungs gets delivered to
the left side of the heart. The heart
pumps the blood into the bloodstream.
As the blood cells travel around the
system, it burns oxygen which turns to
CO2 and the blood gets pumped back to
the heart.