What is the circulatory system?
lesson 1
lesson 1
What do a mouse an a blue whale have in common?
Both are mammals
What constitutes the circulatory (cardiovascular) system?
the heart, the arteries, the veins, and the capillaries
Blood vessels as thick as one hair
capillaries
How many chambers does the human heart have?
4
Why does blood go to the lungs?
To release carbon dioxide and to obtain oxygen
Name 3 mammals
dog, horse, hamster, cow, man, cat, etc.
Which blood vessels carry blood away from the heart?
the arteries
Why do veins have thinner walls than arteries?
they do not have as much pressure as an artery
The top chambers of the heart
right and left atrium
What type of blood do veins carry?
deoxygenated blood
What is a tissue?
a group of the same kind of cells that work together to do the same job
Which blood vessels carry blood to the heart?
veins
How many capillaries does your body have?
ten billion 10,000,000,000
Lower chambers of the heart
right and left ventricle
What type of blood do the ateries carry?
oxygenated blood
What is an organ?
a group of different tissues that join together into one structure
The largest artery
aorta
What does too much fat do to your body?
it clogs your arteries
Muscle separating the right from the left side of the heart
septum
How big is your heart?
Clenched fist
What is a system?
a set of things that work together as a whole
The largest vein
vena cava
How could you reduce the amount of fat in your diet?
eating lower-fat foods
The direction of the blood flow
left atrium, left ventricle, entire body, right atrium, right ventricle, the lungs
Would the heart pump faster when playing basketball or when sleeping?
when playing basketball