Body Works

Unit 21B: Inside a Pump

November 6, 2014

Activity 21B: Inside a PumpNovember 6, 2014

Getting Started: Brainstorm some things you know about the heart.

Introduction: Read pg B-59 and RACE the following question: Based on the reading, what do you think the purpose of this lesson is?

Inside a Pump

Think back to when you measured pulse rate. What did you learn? Most of what you learned probably relates to how the heart functions in the human body. In this activity, you will consider how the structure of the heart allows it to function the way it does.

What type of pump is better for pumping water? What does this tell you about the structure of your heart?

21B

Challenge: Rewrite the challenge question in your own words.

Key Words: Function, Model, structure, blood

Procedure: Have you read and do you understand the procedure on B-59 and B-60? Write a one sentence summary for the procedure.

Results: Bulb Cross-Section and question 1

Analysis: Analysis Questions 2

Reflection: Which type of bulb is better at pumping water? Your heart pumps blood around your body. Would you expect it to work more like the siphon bulb or the pressure bulb? Explain.

What were the differences in how water flowed through the two

different pumps.

What do you think is in each bulb?Which way does water flow inside the bulb?

What made one bulb work better then the other?

Bulb Cross-Section

Analysis Question 2

• Which type of bulb is better at pumping water? Why?

Bulb Cross-Section

What prevented water from flowing in both directions inside the

pressure bulb?

Bulb Cross-Section

Do you expect valves in your heart to look similar to or different from

valves in the pressure bulb?

Bulb Cross-Section