South Carolina ETV
South Carolina ETV
1101 George Rogers Boulevard
Columbia, SC 29201-4761
Phone: 803-737-3545
Body and Blood (Grade 7)
Master Teacher
Nancy T. Vickers
Time Allotment
Two 40-minutes classes
Overview
The human body is a complex anatomical system. During aerobic activity the cardiovascular system supplies oxygen to working muscles and carries the waste product, carbon dioxide, away. The video will provide a visual image of the heart pumping an oxygen-enriched blood supply through arteries to the muscles in use during exercise.
Students will participate in activities (e.g., finding their resting heart rate) to provide a benchmark of their understanding of how active muscles need oxygen as fuel. Students will select aerobic activities, perform fitness tests on their classmates, record the data on a handout sheet, and analyze this information to better understand the importance of a strong and healthy heart.
Subject Matter
Physical Education
Learning Objectives
Students will be able to:
- use a stopwatch to find their resting heart rate for one minute, 30 seconds, 15 seconds, then calculate the average
- use a stopwatch to find the resting heart rate of a partner for one minute, 30 seconds, 15 seconds and calculate the average
- use a stopwatch to find and calculate the heart rate of a group member after aerobic activity
South Carolina Standards
These Standards can be found online at Office of Curriculum Standards.
Standard 4: Achieves and maintains a health-enhancing level of physical fitness.
Students will be introduced to principles of training and convey how these principles can be used to improve physical fitness.
Students will interpret results of fitness testing tools and use this information to set individual goals.
Media Components
Video
Our Human Body, Lesson 6: "What is Blood?"
Materials
6 stopwatches (1 per group)
Aerobic Equipment:
2 treadmills, 2 stair steppers, 2 stationary bikes
access to a computer and printer (one computer per group)
Resting Heart Rate Work Sheet (Activity Sheet 1)
Prep for Teachers
Prior to teaching this lesson:
Preview the video and cue the segment.
Evaluate cardiovascular room for safety and put a stopwatch, recording sheet, and pencil at the following six stations: 2 treadmills, 2 stationary bikes, and 2 stair steppers.
Duplicate the Resting Heart Rate Work Sheet (one per student)
When using media, provide students with a Focus for Media Interaction, a specific task to complete and/or information to identify during or after viewing of video segments, Web sites, or other multimedia elements.
Introductory Activity
Step 1: As a class, initiate a discussion about pulse rate. Ask the question, "This past week after we have completed an aerobic routine I have asked you to place your hand over the left side of your chest. What were you feeling?" (Expect answers like, "I felt my heart beating hard. I felt my lungs working faster and harder.").
Step 2: "Today I want to show you a picture of what is happening inside your body after you exercise real hard. Because this video segment is short I will play it two times." Provide a Focus for Media Interaction by asking the students to identify what parts of the body the blood travels through as it carries essential oxygen and nutrients to muscles.
Insert the video Our Human Body, "What Is Blood?," into the VCR. START the tape where you see, "Driven by a pumping heart. . . . " STOP the tape when the narrator says, " . . . to every part of the body." The clip ends with a picture of two runners.
Step 3: Rewind the video, mute the sound, and pause on the picture of the entire body's circulatory system and point to the heart, the carotid artery in the neck and the radial artery in the wrist.
Learning Activity
Step 1: Show students the two locations on their bodies to take their resting heart rate: carotid artery (neck) and the radial artery (wrist). (Note to Teachers: Model this procedure for the students.) Explain HEART RATE to the class. Tell them that every time their heart beats, the beat can be felt. Give each student an Activity Sheet 1: Resting Heart Rate Work Sheet. Have the students take their resting heart rate for one minute and record the data. Have students take their pulse for 30 seconds and multiply times 2 and record the data. Perform the same task for 15 seconds and multiply times 4.
Step 2: Placed in groups of three, have the partners practice locating the heart rate on their group members recording three resting heart rates. The group members will add the 3 resting heart rates, divide by 3 and determine the average resting heart rate of each member.
Step 3: Allow each student to choose one of the following roles: First person times and records, second person locates and counts the heart rate of the exerciser, third person is the exerciser, the one performing the aerobic activity.
Step 4: Ask the students to predict the heart rate of the performer of aerobic activity after 2 minutes of strenuous aerobic activity. Ask the students to predict which aerobic equipment will yield the fastest heart rate.
Culminating Activity
Step 1: Back in the classroom, ask each group to share the data it accumulated on the aerobic equipment.
Step 2: Compare this data with predictions made prior to the aerobic activity.
Cross-Curricular Extensions
Mathematics: Locating and recording their own and a partner's resting heart rate three times apiece, the students will find the averages.
Art: The students will color a diagram of the veins and arteries according to the amount of oxygen needed on their specific aerobic exercise.
Language Arts: The students will write in their journals how they think a marathon runner who goes 26.2 miles feels after completing a race.
Community Connections
Visit the local YMCA and tour the varied cardiovascular equipment available within the facility.
Invite a famous local athlete like South Carolina Olympic runner Tim Montgomery to the class and let the students hear first hand the capacity of the human body to achieve enormous athletic feats.
Student Materials
- Resting Heart Rate Work Sheet (Activity Sheet 1)
- pencil
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