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Circulatory System
Circulatory System
Carries nutrients, oxygen and other substances to all the cells of the body
Carries away waste products
Distributes oxygen throughout the body
Contains 3 main parts
Main Parts
Heart – acts like a pump moving blood throughout the body
Blood – made of many parts
Blood Vessels – consists of veins, arteries, and capillaries
THE BLOOD
Function of Blood
Transport oxygen and nutrients throughout the body
Carries waste materials to the lungs and kidneys
Regulates body temperature
Fights diseases
Parts of Blood
Plasma
Red Blood Cells
Platelets
White Blood Cells
What do you already know?
Whole Blood Sample
Red blood cells
White blood cells
Platelets
Plasma
Sample Placed in Centrifuge Blood Sample That Has Been Centrifuged
Whole Blood Sample
Red blood cells
White blood cells
Platelets
Plasma
Sample Placed in Centrifuge Blood Sample That Has Been Centrifuged
Whole Blood Sample
Red blood cells
White blood cells
Platelets
Plasma
Sample Placed in Centrifuge Blood Sample That Has Been Centrifuged
Plasma
Liquid part of blood
Made of water and other molecules
Clear, yellowish liquid
Carries dissolved nutrients to the cells of the body
Carries carbon dioxide and wastes away from the cells
Makes up about 55% of blood
Red Blood Cells
Makes up about 44% of blood
Relatively small in size
Numerous in number
Cells are disk shaped with the center of each side pushed in
Red Blood Cells Cont.
Carries oxygen molecules from the lungs to other parts of the body
Do not have a nucleus
Cannot reproduce
Get color from oxygen – carrying chemical called hemoglobin
Platelets Small, colorless packets of cytoplasm
Causes blood to clot
Blood Clot: think about your scabs… and draw a picture of how this works.
Notice how they form a trail – they stick together to any foreign surface!
White Blood Cells Relatively large
Few in number
Have a nucleus
Fights invading organisms by producing antibodies (FIGHTS GERMS!)
http://en.wikipedia.org/wiki/White_blood_cell
Look at the table to view different kinds of white blood cells.
What are some of the things your white blood cells do for your body?
Red vs. White Cells Real Player Video
Blood Vessels
3 Major Types of Blood Vessels
Arteries – Blood vessels that carry blood away from the heart
Veins – blood vessels that carry blood to the heart
Capillaries – tiny blood vessels that connect arteries to vein
With each heartbeat, arteries carry about 20 to 25 percent of your blood to your brain, where billions of cells use about 20 percent of the oxygen and fuel your blood carries.
When you are thinking hard, your brain may use up to 50 percent of the fuel and oxygen.
Interactive of how it works… http://www.kscience.co.uk/animations/blood_s
ystem.swf
Complete Diagram
Moving Blood to and away from the Heart
Arteries and Veins Real Player Video Clip
The Heart
The Heart
Powerful, muscular pump
Maintains a continuous flow of blood around the body
Divided into 2 halves Atrium: smaller, upper
chamber Ventricle: larger, lower
chamber
The Heart http://www.ahealthyme.com/Imagebank/heart.
swf
Heart Interactive 2 http://science.nationalgeographic.com/science
/health-and-human-body/human-body/heart-article.html
Label Diagram
Label the diagram
in your notes now.
The Path of Blood1. The heart pumps blood to the lungs
2. The blood gets oxygen in the lungs
3. The blood returns to the heart
4. The heart pumps the oxygenated blood to the cells in the body
5. The blood delivers oxygen to the body cells
6. The deoxygenated blood travels back to the heart
What can you do to stay healthy?
Eat right!
Exercise!
Don’t Smoke!
