The circulatory system of mammals

• Mammals also have a transport system just like plants
• With this transport system things like food, oxygen,water and other substances are carried to all parts of the body.
• In mammals the heart acts as a pump to create the force required to push these substances through blood vessels (tubes)
• The circulatory system of mamals is made uf the heart and blood vessels
• At certain places inside the system there are valves to ensure that blood only flows in one direction.
• Mammals have a double circulation/pump action.
• The double action keeps the blood pressure high enough to force the blood through the vessels.
• Blood flows from the heart to the lungs where it is oxygenated and back to the heart
• From there it is pumped to the rest of the body.

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