Heart and Circulation: Follow the Blood and Do the Math

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Science · Anatomy and Physiology
SP-ANAT-004 · Free to print and use in your classroom · substituteplans.com
Page 2
Heart and Circulation: Follow the Blood and Do
the Math
Science · Anatomy and Physiology · Grades 9-12 · 50 minutes
Time needed
50 minutes (one class period)
Prep
Copy the 2-page worksheet (one per student). Calculators are helpful but not required.
Technology
Optional: calculators for arithmetic only.
Student
independence
High. Reading and individual work, with a short partner check.
Copies to make
One 2-page worksheet per student
Materials
Pencils, Worksheet, Calculators (optional)
Goal for today: Students will trace the path of blood through the four heart chambers, calculate beats per minute and
cardiac output from given data, and describe the roles of arteries, veins and capillaries.
Before the bell
☐ Copy the worksheet, one per student (2 pages).
☐ Put out calculators if available. Students can also calculate by hand.
☐ Do NOT have students exercise or take their own pulse in class. All data are provided on the page.
Say this to start
Today you will follow a drop of blood through the heart and work with some real-style heart data. All the numbers are
on the worksheet, so no one needs to run or check their pulse. Read the passage first. Then fill in the blood path and
do the math. Show your work in the boxes.
Run of show
Minutes
What you do
What students do
0–5
Take attendance. Hand out the worksheet and read the
directions aloud.
Look over the worksheet.
5–14
Ask students to read the passage silently and underline the
path of the blood.
Read and underline.
14–24
Tell students to complete Part A (questions 1–6), using the
word bank.
Fill in the blood path.
24–38
Tell students to complete Part B (questions 7–11). Remind
them that heart rate means beats per minute. Walk the
room.
Calculate heart rates, cardiac output and
beats per hour.
38–44
Tell students to answer questions 12–14 (Part C).
Answer the multiple-choice and
short-answer questions.
44–50
Read the answers from the key. Students check their own
work. Collect worksheets.
Correct errors and hand in the worksheet.

SubstitutePlans.com
Science · Anatomy and Physiology
SP-ANAT-004 · Free to print and use in your classroom · substituteplans.com
Page 3
If things go wrong
• If students ask to measure their pulse, say this lesson uses the given data only. They may sit quietly.
• If a student struggles with the cardiac output formula, point to the passage where it is stated: heart rate ×
stroke volume.
• If students get different answers on the math, tell them to recheck the multiplication and the units (mL versus
L).
• If a student finishes early, use the early finisher list.
Early finishers
• Draw a simple four-chamber heart on the back and label the right atrium, right ventricle, left atrium and left
ventricle.
• Write a short explanation of why the left ventricle needs a thicker, stronger wall than the right ventricle.
Support and challenge
• Support: Let students use a calculator and complete questions 1–6 and 7–9 first, then do questions 10–11 if
time allows.
• Challenge: Ask students to calculate cardiac output after exercise using 132 beats per minute and 90 mL
stroke volume, and compare it with the resting value.
Notes for the teacher (you fill this in)
Jot a few lines before you leave. A full Daily Sub Report is in the free Sub Survival Kit at SubstitutePlans.com.
How far the class got / what to pick up next:
Students who were especially helpful:
Anything the teacher should know: