1
What are the three main components of the circulatory system?
Heart, blood vessels, and blood.
How do the walls of arteries compare to the walls of veins?
Arteries have thicker walls than veins.
What is the main organ of the circulatory system?
The heart is the main organ of the circulatory system.
What is the color of blood?
red
What is the muscular organ that pumps blood throughout the body?
heart
What are the tiny cells that help blood clot?
Platelets.
What type of muscle makes up the heart?
Cardiac muscle.
What is the name of the body system that carries blood throughout the body?
circulatory system
What are the tubes that carry blood called?
Blood vessels.
What are the three main components of blood?
Red blood cells, white blood cells, and platelets.
What do human body cells need to function?
Human body cells need oxygen to work.
What is the main function of red blood cells?
To carry oxygen.
What is the function of the heart?
To pump blood throughout the body.
What is the main function of white blood cells?
To fight infection.
What is the function of platelets?
To help blood clot.
Do arteries carry blood to or from the heart?
Away from the heart.
What are the smallest blood vessels called?
Capillaries.
How do the walls of capillaries compare to the walls of arteries and veins?
Capillaries have very thin walls.
What are the two main types of blood vessels?
Arteries and veins.
Do veins carry blood to or from the heart?
To the heart.
What is the biggest blood vessel in your body?
The aorta.
What important gas do our cells need to function?
Oxygen.
How many chambers does the human heart have?
4
What is the function of capillaries?
To exchange oxygen, nutrients, and waste products between blood and tissues.
What are the cells that help fight infection?
White blood cells.