Circulatory System Flashcards
What is the primary function of the Circulatory system?
Delivers water, oxygen, and nutrients to cells and carries Carbon Dioxide away from cells to the lungs to be exhaled.
What organ pumps blood through the body?
Heart
What do arteries do?
Carry blood AWAY from the heart to body cells.
What is the function of veins?
Carry blood TOWARD the heart.
What are capillaries?
Tiny blood vessels that exchange materials with cells.
What does blood carry to every cell in the body?
Oxygen, nutrients, and water.
What type of muscle makes up the heart?
Cardiac muscle.
How often does the average human heart beat per minute?
70 times per minute.
How many times does the average heart beat in one day?
100,000 times per day.
Approximately how many times does the heart beat in a year?
36.5 million beats per year.
How many beats does the heart make in 70 years?
2.5 billion beats.
How much blood does the heart pump per day?
About 2,000 gallons.
Why is human blood red?
Because it contains iron.
What are blood vessels made of?
Smooth muscle.
What happens to blood vessels to slow the flow of blood?
They contract.
Where is new blood made in the body?
Inside of the bones.
Fill in the blank: The heart pumps enough blood each day to fill an _______ swimming pool.
8x10 foot
