A
What is the main organ of the respiratory system?
Lungs
What are the 2 main parts of the circulatory system?
Heart & blood vessels
The heart's job is to ________ blood.
pump (circulate)
The __________ protects the heart and lungs.
rib cage
What are capillaries?
the smallest blood vessels where arteries and veins connect
The respiratory system supplies the body with _______ and removes ______.
oxygen; carbon dioxide
The scientific word for 'breathing out' is...
exhalation
The scientific word for 'breathing in' is...
inhalation
What is the diaphragm?
large sheet of muscle beneath the chest that contracts & relaxes to move air in & out of lungs
What is the pharynx commonly known as?
the throat
During inhalation, the diaphragm moves _______ and the ribs________
down; moves out (contracts)
During exhalation, the diaphragm moves ________ and air is forced ______ the lungs.
upwards; out
What is the correct order of the respiratory system?
nose, pharynx, larynx, trachea, bronchus, bronchioles, alveoli
How does the diaphragm help in the process of breathing?
It moves up & down to push & pull fresh air in & out out of the lungs.
The heart is a muscular organ that _______ to pump blood.
contracts & relaxes
Tiny air sacs in your lungs that take up the oxygen you breathe in and keep your body going are called...
Alveoli
What is commonly referred to as the “voice box”?
Larynx
The trachea divided into two smaller tubes is called...
Bronchi
Commonly known as the windpipe, begins under the larynx and runs down behind the breastbone (sternum in between ribs). This is the...
Trachea
Branches of the bronchi and allow gas exchange with blood: their many branches branch out into the alveoli is called...
Bronchioles
The heart pumps oxygen poor blood to the ______. The heart pumps oxygen rich blood to the _______.
lungs; body
___________ carry oxygen-rich blood to all parts of the body, and ____________ carry oxygen poor and carbon-dioxide rich blood to the lungs.
Arteries; veins
Explain how the respiratory & circulatory systems work together to keep us alive.
Respiratory system: takes oxygen from air & transfer to bloodstream; then takes carbon dioxide out from blood and into the air
Circulatory system: takes oxygen-rich blood to cells all over the body; then the bloodstream carries carbon dioxide back to the lungs to be exchanged for oxygen
Label the respiratory system
1. nose cavity
2. mouth cavity
3. larynx
4. trachea
5. lobes of the lungs
6. pharynx
7. bronchi
8. bronchioles
9. alveoli
10. diaphragm
How does the blood flow?
Deoxygenated blood flows into the right ventricle, which then gets pumped into the lungs. Oxygenated blood flows from the lungs into the left ventricles then to the body.