circulatory system chapter 3, lesson 1- by shay traywick
TRANSCRIPT
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Circulatory System
Chapter 3, Lesson 1- by Shay Traywick
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What is the circulatory system?
• The circulatory system moves materials around the body
• Think of it like your body’s “transportation system”
• The circulatory system moves food and oxygen to the cells and takes away the cells’ waste
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What are the parts ?
• Heart
• Blood
• Blood vessels
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What is blood made up of?
• Blood contains: – Plasma– Platelets– Red blood cells– White blood cells
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Plasma (in the blood!)
• The biggest part of your blood is a straw-colored liquid called Plasma:– Carries food from
digestive system to your cells
– Carries away cells’ waste
– Takes water to the cells
– Moves some chemicals from one part of the body to another
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Red Blood Cells (also in blood!)
• The next largest parts of your blood are Red Blood Cells:– Red blood cells carry
oxygen to cells
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White Blood Cells & Platelets (last 2 parts of the blood!)
• White blood cells work hard to protect your body from germs, etc.– When the body needs to
fight infection, it makes more white blood cells
• Platelets cause blood clots to form, minimizing loss of blood from cuts
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3 Kinds of Blood Vessels(think of blood vessels as highways your blood uses to move through the body!)
• Arteries
• Capillary
• Veins– Valves
LOOK AT PICTURES ON pg. 66 & 67
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Arteries (a kind of blood vessel)
• Arteries are blood vessels that carry
blood AWAY from your heart
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Veins & Valves(still part of blood vessels)
• Veins are blood vessels that take blood from cells
BACK to the heart
• Valves are flaps that act like doors that keep blood flowing in 1 direction.
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Capillaries(still part of blood vessels!)
• Capillaries are the smallest blood vessels, very thin walls
• Capillaries joint together to from your tiniest veins
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The heart has parts???
• Your heart has 4 chambers
• The upper part of each side is the: atrium
• The lower part is called: ventricle
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Tell me more about the HEART
• Right side- collects blood that has circulated through the body and pumps it to the lungs
• Left side- collects oxygen-rich blood from the lungs & pumps it to the arteries
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Let’s Review what we learned…
• What is the circulatory system?
• What makes up the circulatory system?-3 things
• What makes up blood?-4 things
• What kind of blood vessels did we discuss?- 3 kinds
• Tell me how the heart is divided?
• What is the circulatory system like that we can compare it to???
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Study Study Study!!
• Check out the great pictures in your text…
• Do you have any questions????