Which organs are responsible for breathing?
Lungs
What is the aprproximate size of our heart?
The size of our fist.
How many liters of blood does an adult have?
Five liters
How long does it take for the blood to leave the heart, circulate through the whole body and come back to the heart?
60 seconds.
What are the different kinds of blood vessels?
Arteries, veins, and capillaries.
Which kind of blood vessel carries blood away from the heart?
Artery.
Which kind carries blood to the heart?
Vein
Which kind connects the arteries to the vein?
Capillaries.
How many chambers is the heart divided in?
Four.
