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The Circulatory and Respiratory Systems Cheat Sheet by

To help you study for a test or for fun!


The Respir­atory
The Circul­atory
To get oxygen into the body and to remove Carbon Dioxide out of the body.
To transport nutrients, oxygen and other products as well as dispose of wastes like Carbon Dioxide

Key Terms

Oxygen Debt: Shortfall of oxygen to the body after maximal effort/ anaerobic exercise, resulting in deep and shallow breathing (Running short distance, very fast, once you stop you breath heavily to gather more oxygen.)
Heart rate: The amount of beats per minute.
Vital Capacity: The maximum amount of air that can be forcibly exhaled after breathing in as much as possible.
Stroke Volume: The amount of blood pumped by the heart in one beat.
Tidal Volume: Amount of air breathed in and or out at rest.
Cardiac Output: The amount of blood pumped by the heart in one minute
To get Cardiac Output: Stroke volume TIMES (X) Heart rate,

Breathing 101

Mechanism of breathing
What happens when we breath in?
What happens when we breath out?
Lungs are not muscles therefore they can't move on their own accord. They are helped by the diaphragm and the interc­ostal muscles between the ribs.
Our diaphragm pulls down
Our diaphragm relaxes
Our interc­ostal muscles contract as air pressure is reduced (to make room for all the new air)
Our interc­ostal muscles relax and the pressure increases in our lungs as the air is forced out (releasing the air like squeezing a balloon)
Air is sucked through the tubes into the lungs
Our chest then becomes smaller (as all the air is gone now)
Our chest then expends (as air is in it now)

Parts of Systems

3 parts
3 parts
Diaphragm, Lungs, Air Passag­eways
Blood, Heart, Blood Vessels


First time making one of these, sorry if its not that good.

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