The Respiratory System
Thinking Questions
What is the main function of the
respiratory system?
What is the main function of
the respiratory system?
Supplies O2 (Oxygen) to the blood
and removes CO2 (Carbon
dioxide) from the blood
How are oxygen, carbon dioxide,
and other waste gases
exchanged in the lungs and body
tissues?
How are oxygen, carbon
dioxide, and other waste gases
exchanged in the lungs and
body tissues?
Oxygen, carbon dioxide, and other
waste gases are exchanged by
diffusion between body cells and
blood
What causes air to move into
and out of a person's lungs?
What causes air to move into
and out of a person's lungs?
The movement of the diaphragm
and rib cage creates a change in
air pressure
How is the work of the digestive
system related to the respiratory
system?
How is the work of the
digestive system related to the
respiratory system?
The digestive system provides glucose
(from carbohydrates) needed for cellular
respiration. The respiratory system
provides the oxygen need for cellular
respiration.
Why do capillaries surround
alveoli?
How is the work of the
digestive system related to the
respiratory system?
The digestive system provides glucose
(from carbohydrates) needed for cellular
respiration. The respiratory system
provides the oxygen need for cellular
respiration.
Why do capillaries surround
alveoli?
Why do capillaries surround
alveoli?
So that oxygen and carbon dioxide can
be exchanged easily by diffusion through
the cell membranes.
How are lungs excretory
organs?
How are lungs excretory
organs?
They release waste products (carbon
dioxide and excess water).
How does the oxygen in the
alveoli get to the body cells?
How does the oxygen in the
alveoli get to the body cells?
Oxygen diffuses into capillaries, where it
is picked up by hemoglobin and taken in
the bloodstream to all body cells
You have just finished jogging
for 10 minutes and your chest is
heaving. Why?
You have just finished jogging
for 10 minutes and your chest
is heaving. Why?
The body uses more oxygen during
exercise. Your lungs inhale and exhale
faster when you exercise to give your
body cells more oxygen.
Why do cells need oxygen?
Why do cells need oxygen?
Cells need oxygen to release energy from
glucose (cellular respiration).
Explain the difference between
respiration and breathing.
Explain the difference between
respiration and breathing.
Breathing is the process in which air
moves into and out of lungs. Respiration
is the process in which oxygen is used to
release energy from the glucose in cells.
How does your diaphragm
contracting help in inhaling?
How does your diaphragm
contracting help in inhaling?
When muscles contract, they become
smaller and pull. The diaphragm
contracts and moves down, creating a
bigger space in the chest cavity for air to
fill the lungs.