Lesson I- Parts of the Circulatory System

I. Learning Objectives

  1. What are the major parts of a Circulatory System?
  2. Show proper care to our circulatory system.

II. Concept/Terminologies:

 Circulatory System- is responsible for transporting materials throughout the entire body.

  1. heart- is an amazing organ. Keeps on pumping blood in our body.
  2. blood – is an amazing substances that is constantly flowing through our bodies.
  3. blood vessels- passageway of the blood.

III. References:

  1. Science for Daily Use, pp. 2-4
  2. Into the Future: Science & Health 6, pp. 2-5

IV. Review of Related Lessons:

           Look at the picture.   What system are these?  

             skeleton.jpg             digestive.jpg                respiratory.jpg

V. Lecture Presentation:

  1. Motivational Question:

       Have you ever wondered how food elements reach up the tip of your nail? How do you think food elements reach every part of our body?          

2. Presentation:

      Have you ever wondered how food, oxygen and other substances reach the different parts of your body? And how the waste product that your body produces after using food and oxygen are brought out of the body? Look at the picture. What system is this? Books, pp.  


What is the job of the Circulatory System? The Circulatory System is responsible for transporting materials throughout the entire body. It transports nutrients, water, and oxygen to your billions of body cells and carries away wastes such as carbon dioxide that body cells produce. It is an amazing highway that travels through your entire body connecting all your body cells.


Parts of the Circulatory System
The circulatory System is divided into three major parts:

  1. The Heart
  2. The Blood
  3. The Blood Vessels

The Heart

The Heart is an amazing organ. The heart beats about 3 BILLION times during an average lifetime. It is a muscle about the size of your fist. The heart is located in the center of your chest slightly to the left. It's job is to pump your blood and keep the blood moving throughout your body.

It is your job to keep your heart healthy and there are three main things you need to remember in order to keep your heart healthy.

  1. Exercise on a regular basis. Get outside and play. Keep that body moving (walk, jog, run, bike, skate, jump, swim).
  2. Eat Healthy. Remember the Food Pyramid and make sure your eating your food from the bottom to top.
  3. Don't Smoke! Don't Smoke! Don't Smoke! Don't Smoke! Don't Smoke!


The Blood

The blood is an amazing substance that is constantly flowing through our bodies.

  • Your blood is pumped by your heart.
  • Your blood travels through thousands of miles of blood vessels right within your own body.
  • Your blood carries nutrients, water, oxygen and waste products to and from your body cells.
  • A young person has about a gallon of blood. An adult has about 5 quarts.
  • Your blood is not just a red liquid but rather is made up of liquids, solids and small amounts of oxygen and carbon dioxide.

Blood Cells 

The Red Blood Cells, White Blood Cells and Platelets are made by the bone marrow. Bone marrow is a soft tissue inside of our bones that produces blood cells.

The Blood VesselsIn class we talked about three types of blood vessels:

  1. Arteries
  2. Capillaries
  3. Veins
  • One drop of blood contains a half a drop of plasma, 5 MILLION Red Blood Cells, 10 Thousand White Blood Cells and 250 Thousand Platelets.
  • You have thousands of miles of blood vessels in your body. "Bill Nye the Science Guy" claims that you could wrap your blood vessels around the equator TWICE!
  • Keep your heart healthy…it's going to have to beat about 3 BILLION times during your lifetime!

    3. Summary:

  1. What are the parts of the circulatory system we have identified?
  2. Which produces the beat?
  3. What is the duty of the blood in our body?
  4. What s the function of the blood vessels?
  5. Which organ in the drawing are not part of the circulatory system? why are they shown?
  6. Why do you think the heart is a very strong muscular organ?
  7. what are the things to remember in order to have a healthy heart?

VI. Learning Activities:

      For more leraning activities log on to www.thepotters.com/puzzle/circulatory.html and


VII. Evaluation:

      For your evaluation log on to www.prongo.com/quizstation

VIII. Assignment

      Draw the Circulatory system and label it.


7 Responses to “Lesson I- Parts of the Circulatory System”

  1. maika pudadera Says:

    why that the other parts of circulatory system is not mentioned here.And why that function of this is not included.

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  6. izabel nieto Says:

    its cool i also know so many facts about the circulatory system

  7. Jhon Mark Bucalan Says:

    It learn more

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