Correct Lifestyle Habits to Have Healthy Heart, Lungs and Structure of Circulatory System


GRADE - 11

GOAL - The students will learn about the structure of circulatory system and identify ways to keep healthy heart and lungs in healthy condition.


  • Describe the structure of circulatory system
  • Name relation to other body systems
  • List five ways to keep healthy heart and healthy lungs

LEARNING TASKS - Begin your lesson with DO NOW question on the board "Why do you think circulation system is also called transportation system?" Have your students share their answers with the class after about three to four minutes. In your students' answers you should hear - because it carries nutrients, oxygen, waste, germ fighters and hormones. Excellent start! Let's move on.

Now after discussing DO NOW question - we can easily say that circulatory system equals to transportation system. Without healthy heart and healthy lungs - transportation system would not be able to carry passengers around the body to many destinations.

So - the function of this bus line is to carry oxygen, nutrients and hormones to the cells. Also - it removes waste.

The main engine is the heart. The heart is a muscle that acts as a pump. It pushes blood through blood vessels in the entire body.

Let's look at this picture of how the healthy heart pumps blood around the body.

The heart is a very strong muscle that has four chambers. When blood is oxygen-poor in the right atrium - blood is pushed to the lungs to refuel itself with oxygen. From the lungs - blood travels back to the heart to the left atrium. From the left atrium - blood is pumped down to the left ventricle and is pushed out to the arteries. Arteries always carry rich oxygen blood. After blood has delivered nutrients, oxygen and took waste away from the cells - blood goes into veins. Veins always carry oxygen poor blood. From veins - blood enters the right atrium again and right ventricle pumps the blood to the lungs.

How do nutrients and oxygen get to the cells from the blood? Good question. It gets to the cells through capillaries. Capillaries are very small branches that connect arteries and veins together.

At this point - distribute worksheets to the students with empty blanks to label main organs of the system, four parts of the healthy heart, lungs, rich oxygen tubes carriers and poor oxygen carriers.

The heart creates blood pressure. Blood pressure is the force that is created on the walls of the blood vessels. When it contracts that's when blood pressure is the greatest. Between beats that's when heart is relaxing.

The blood is a very important part of your body. It has four parts -

  • Plasma is the car of the transportation system which is made of 92% of water - it carries dissolved food
  • Red blood cells carry oxygen to cells and takes waste away from them
  • White blood cells are disease and germs fighters
  • Platelets help your blood clot

It's hard to imagine our lives without circulatory system. Here are a few ways to follow so that we live longer and stay healthier -

  • Healthy diet - eat less of fat, sugar, salt and caffeine to keep blood vessels wide open and keep blood pressure normal
  • Avoid stress - stress strains your heart
  • Exercise - makes lungs and heart stronger
  • Avoid tobacco - it reduces amount of oxygen in your arteries
  • Healthy weight - puts less strain on your heart

Conclusion - What is the function of the circulatory system? Explain how this system relates to other systems? Name three ways of how to keep transportation system healthy?

Here - I'm providing you with two worksheets. First - labeling of transportation system. Second - understanding of transportation system fill ins.

Circulatory system labeling and fill ins worksheets

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