Circulatory System Design (DOC) by pptfiles


									Circulatory System Design (English version)

RET Program: 2004

RET Teachers: Jennifer Geer José Santiago

Course: Biology 1, Anatomy and Physiology, Biology 2

Grade Level: 9-12

Sunshine State Standards: SC.H.1.4.1, SC.H.1.4.7, SC.H.3.4.1, SC.F.1.4.4, SC.F.1.4.2, SC.H.3.4.6

Lesson Objectives: Students understand the role of the circulatory system in the body. Define the functions of the parts of the circulatory system. Design a model of the circulatory system.

Student Objectives:         Students will understand the function of the circulatory system. Students will recognize various parts of the circulatory system including: heart, arteries, veins and blood. Students will identify the major components of the heart, arteries, veins and blood. Students will build a model of the circulatory system. Students will use the model to determine the rate of blood flow through the circulatory system. Students will collect data in a meaningful and organized manner. Students will draw appropriate conclusions from data. Students will correctly answer questions related to the model.

Time Required for Lesson: five 55 minute classes

Required Materials: plastic bottle, 4 feet of 7/8 inch of flexible tubing, 2 feet of ¼ inch of flexible tubing, clamps, glue, syrup, water, paper, pencil, crayons or markers, watches with second hands, red candy, white candy, blue candy, scissors.

Additional Resources: Computer with internet access.

Supplemental Materials: Circulatory system poster, heart circulatory poster, overhead projector, video of the heart.

Vocabulary: circulatory system, heart chambers, blood, blood vessels, arteries, pulmonary circulation system, heart rate, valves.

Lesson Procedures: 1. Pretest to determine students background knowledge of the circulatory system. 2. List the functions of the human circulatory system. 3. Identify and describe the function of the different parts of the circulatory system. 4. Get into groups of three or four. 5. Mix the colored candies to represent the ratio of components of blood including red blood cells, white blood cells and platelets. 6. Have the students measure and record their pulse (heart rate) while resting and after exercise. 7. Create a model of the circulatory system. 8. Record the time for the blood to flow through the model. 9. Record the number of compressions required to move the blood through the model. 10. Complete the post lab worksheet. 11. Discuss and compare the data from the other groups.

Student Evaluation: Students will be assessed on their performance on the worksheet, their ability to work as a team and active participation in class discussions.

Teaching Tips: On average, your body has about 5 liters of blood continually traveling through it by way of the circulatory system. The heart, the lungs, and the blood vessels work together to form the circle part 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. The heart is a hollow muscle. It is about the size of your fist. It is located slightly to the left of the center of your chest. The hollow inside is divided into four sections. These sections are called chambers. Each side has an upper and lower chamber. The upper is calling atrium. The lower is calling ventricles. The valves within the heart are one-way valves. This means that blood can flow into the heart but not back into the arteries or ventricles Blood has two main constituents: the cells and the liquid portion or plasma. The blood cells comprise three main types: red blood cells, white blood cells, and platelets. The main function of the red blood cells is to transport oxygen from the lungs to the tissues and to transport carbon dioxide, one of the chief waste products, it to the lungs for release from the body. The white blood cells are involved in defending the body against foreign organisms. The platelets' primary function is to stop bleeding. Arteries are blood vessels that carry oxygen rich blood away from the heart. Capillaries are tiny blood vessels as thin or thinner than the hairs on your head. Capillaries connect arteries to veins. Food substances (nutrients), oxygen and wastes pass in and out of your blood through the capillary walls. Veins carry blood back toward your heart. Cut the bottom out of a plastic bottle with scissors. Be careful with the sharp edges. The bottom of the bottle will be used as the valve. Cut the middle of the bottom three ways to represent the tricuspid valve (Fig. 1). Invert the valve and place it in the

lower portion of the bottle. Cut three feet and two feet section of the 7/8 inch tubing. Cut 7 one-foot section of the 5/16 inch tubing. The three feet section represents the arteries. The two feet section represents the veins and the 7 one foot sections represent the capillaries. Place some glue around the opening of the bottle, insert the three feet tube into the bottle. Arrange the 7 one foot sections as shown below (Fig. 2). Tie the tubes together and superglue the tubes to each other two inches at the top and bottom. Remove the ties when the glue dries. Carefully insert the top glued tubes into the artery and bottom into the veins. Mix the syrup and water in a 1:3 ratio to make four liters of blood. Place the blood into the model and record the data.

Figure 1

Figure 2

Prelab Test


1. The circulatory system is a transport system. 2. The circulatory system carries CO2 to all cells in the body. 3. The heart is actually a muscle. 4. When you play basketball, your body is working harder than when you are at rest. 5. Your body uses nutrients and oxygen to give your cells energy. 6. The liquid part of blood is called red book cells. 7. Platelets are a part of blood that helps the blood to clot. 8. White blood cells help fight off infection. 9. Plasma is made of mostly red blood cells. 10. The red blood cells give the blood its color.

Post Lab test:

1. What are the components of the circulatory system? 2. About how large is your heart? 3. Name the four chambers and valves in the heart. 4. Trace the pathway of a drop of blood from the aorta back to the aorta. 5. What are the components of blood? 6. Color the path of oxygenated blood red and deoxygenated blood blue on the diagram below.

Label the diagram above:

Aorta Left Auricle Left Ventricle Lungs Pulmonary Artery

Pulmonary Vein Right Auricle Right Ventricle Vena Cava Tissues of the body

Table #1 Exercise with the students Student Name Weight Height Heart Rate (Relax) Heart Rate (after exercises)

Table #2 Exercise using the circulatory system model Liters of Blood Height Compressions Time

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