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Essential Questions•What are the major
systems of the human body?
•How does the Respiratory System help my body function?
•What are the major parts of the Respiratory System?
What does the Respiratory System
Do? You need oxygen to stay
alive. Oxygen gives your body energy.
The Respiratory System is a group of organs and tissues that exchange oxygen and carbon dioxide between your body and the environment.
When you breathe in, your body gets oxygen. When you breathe out, you breathe out carbon dioxide- waste from the body.
What does the Respiratory System
Do?
The Respiratory System Your body uses its
respiratory system to get oxygen from the air.
The major parts of your respiratory system include: nose and mouth, your trachea, your two lungs, and diaphragm.
The Respiratory System• Air enters the body through the nose
and mouth then travels down the trachea (the “windpipe,” or what connects your pharynx to your lungs)
• The trachea branches into two tubes called bronchi, which lead to the lungs.
• At the end of the bronchi are tiny tubes called alveoli, small air sacs.
• Carbon dioxide and oxygen are exchanged in the alveoli and the oxygen rich blood enters the body through the pulmonary veins.
The Diaphragm• The diaphragm is the
muscle that causes you to breathe. When you breathe in, your diaphragm expands (like a balloon). When you breathe out, your diaphragm contracts, or deflates.•hiccups are involuntary
contractions of the diaphragm
Image of the Respiratory System
What’s the Purpose? As the blood passes
through the lungs, it picks up the oxygen and takes it to the cells of the body, where the blood then picks up carbon dioxide and returns it to the lungs.
Let’s Review• The major parts of the
respiratory system include the nose/mouth, trachea, the lungs, and the ______________.• A. liver• B. diaphragm• C. esophagus• D. pancreas
Let’s Review• When you breathe in air,
you bring oxygen into your lungs and blow out:• A. hydrogen• B. carbon monoxide• C. oxygen• D. carbon dioxide
Let’s Review• When you inhale, your
lungs:• A. inflate• B. turn purple• C. make you sneeze• D. deflate
Let’s Review• What is the name of the
tiny air sacs located in your lungs?• A. Bronchioles• B. Ravioli• C. Alveoli• D. Bronx
Let’s Review• The trachea is also
called the _________.• A. lung• B. bronchius• C. diaphragm• D. windpipe
Let’s Review• The lungs bring ______
into the body, and eliminate _______ from the body.• A. oxygen, carbon dioxide • B. helium, nitrogen • C. carbon dioxide, oxygen • D. ketchup, mustard
Let’s Review• What is the main
function of the respiratory system?• A. to break food down• B. supply the blood with oxygen• C. circulate the blood
Let’s Review• Which part of the body
is not used for the respiratory system to work?• A. mouth• B. nose• C. small intestine• D. diaphragm