Unit D

Module 7 ~ Lesson 2


One of the main functions of the circulatory system is the transport of materials. Capillaries are tiny blood vessels that allow nutrients and gases to pass from the blood to the cells and vice versa.

About 1 in 12 Canadian adults are living with a diagnosed heart disease (Government of Canada, 2013). 
Regular exercise and healthy living is the best way to prevent heart disease and help the body maintain homeostasis. Exercise can also help maintain blood pressure and heart rate at healthy levels.

Many new technologies have been developed to treat heart disease or correct congenital defects. These changes have allowed many people to live with a more efficient circulatory system. 

In this lesson, you will explore the following essential questions:

  • What is the relationship between heart rate, blood pressure, and exercise?

  • How can technology treat disorders of the circulatory system?

  • At the capillary level, how does the circulatory system aid the digestive, excretory, respiratory, and motor systems' exchange of matter with the environment?