"Hello, class. Today we are going to be doing an extension class on the Circulatory System."
"The Circulatory System fights off diseases, maintains the body's temperature, and provides the right chemical balance."
"There are four major components in this system. These are your blood, veins, arteries, and heart. There are also the Immune, Muscular, and Skeletal Systems that play a role in helping this system."
"The Immune System keeps your body healthy. Your Muscular System makes the body strong, and the Skeletal System holds the body together and protects main arteries."
"This system helps the body fight off diseases such as Cancer, Anemia, Hepatitis, etc. Ways to stay healthy is to drink plenty of water, eat foods with antioxidants, etc."
"Finally, what happens if something goes wrong with the system? Your blood flow will stop and your muscles won't get any blood, so they will be unable to heal. If your cells do not get blood, you will eventually die. Thank you for staying after to learn more about this system!"