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Science.7
Circulatory System Notes
Essential Questions
1. What are the structures of the circulatory
system?
2. What is the function of the circulatory system?
3. What is blood and why does it circulate
throughout our body?
4. How do the circulatory and respiratory
systems work together?
Vocabulary
circulatory system, heart,
blood vessels, arteries,
veins, capillaries, blood,
fluid, red blood cells,
white blood cells,
platelets, plasma
Name ______________________________
Date _______________________________
Objectives
1. Identify the structures of the circulatory system.
2. Identify the function of the circulatory system.
3. Explain how the circulatory and respiratory systems work
together.
The Heart is a (cardiac) ____________ that has the job of ___________________________ around the body.
The average human heart beats ________ times a minute.
What’s in:
Red Blood Cells
Hold _______________ and carry it to the cells that need it
White Blood Cells

‘Eat’ and ___________________ micro-organisms

__________ __________ by making antibodies to destroy invaders Platelets

Platelets are ______________ of ______________ broken off larger cells.

Platelets produce enzymes to form a net. This net traps other blood cells to form a __________ __________.

Blood clots __________ bleeding.
Where is blood made? _______________________________
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The Artery

Arteries carry blood _____________ from the heart.

They are red because they contain __________ red blood cells

Arteries carry oxygen and __________ (digested food) to your body’s cells.

Arteries are under ________________ created from the heart beat.
Arteries Away
The Vein

Veins carry blood back __________ to the heart

Veins contain blood filled with __________ like __________ __________.

Veins have _____________, which act to stop the blood from going in the __________
direction.
Why do they appear blue?

They __________________________________________________________.

They __________________________________________________________.
The Capillaries

Capillaries __________ arteries to veins

They __________ materials from your blood to the cells in
your body

__________ is dropped off

__________ dioxide is picked up
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