Understanding the Human Circulatory System
Test your knowledge about the amazing system that keeps blood flowing through your body!
Test your knowledge about the amazing system that keeps blood flowing through your body!
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Just to regulate body temperature
Only to fight infections
Only to transport oxygen
To transport nutrients, oxygen, and waste products throughout the body
Left ventricle
Left atrium
Right atrium
Right ventricle
The valves close
The heart contracts
The heart relaxes
Blood flows into the heart
Veins
Venules
Capillaries
Arteries
Arteries have thicker, more muscular walls
Arteries are always larger than veins
Arteries only go away from the heart
Arteries carry only oxygen-rich blood
Valve flaps
Gravity
Blood pressure
Muscle contractions
Delivering blood to the brain
Delivering blood to the heart muscle
Circulating blood through the digestive system
Oxygenating blood in the lungs
Digesting nutrients
Regulating pH
Transporting hormones
Fighting infections
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