We Got the Beat Copyright © 2008 by Youth Take Heart
Dec 21, 2015
We Got the Beat
Copyright © 2008 by Youth Take Heart
1.What does the human heart look like?
*Use the clay you were given to modelWhat you think a heart looks like
Goal: To explain the structure and function of the humanHeart.
?
What is the function of thehuman heart?
Different kinds of pumps:
Bike pump Camera Duster Turkey Baster
What features do they have in Common?
They all…..
•Have an open chamber (air space)
•Have flexible walls
•Move fluids in and out
•Have valves
Common ValvesCar Tire
http://www.microfiberplus.com/tires.htm
Air Mattress
http://www.alpharubicon.com/prepinfo/images/tempsheltbedspitfire2208.jpg
Bike Tubehttp://www.germes-online.com/direct/dbimage/50114262/Bicycle_Valves.jpg
Heart Animations:
HABITS OF THE HEART ©
Click (or Right Click) Play Button to open link
Revising your heart model:
How has your thinking changed?
1.Make any changes to your heart model that you would like.
2.Sketch and describe the changes you made in your science notebook.
3.Explain why you changed your model.
Background Reading:
“Your Heart & Circulatory System”
Click (or Right Click) Play Button to open link
Heart Diagram:
1. Label the following parts:
• atria, valves, ventricles, vena cava and aorta
2. Draw the path of the blood traveling through the heart (use color code below)
----- Oxygen-rich blood
----- Oxygen-poor blood
3. Explain to your partner the path the blood takes as it travels through the heart
Brainstorm:
•How could a pump fail?
•What can go wrong with your heart as a pump?
*Try to think of at least 3 problems a pump/heart could develop
Design Challenge
Design a solution to this problem:• Amy, a 13 year old student at Deer Ridge Middle
School, recently went for a physical for volleyball. She was born with congenital aortic valve stenosis.
• Congenital aortic valve stenosis is a narrowed valve in the aorta.
• When she was born, Amy’s body wasn’t getting as much blood as it could from the left ventricle.
• Her replacement valve, which comes from the outside of a pig heart, has become calcified. Calcium has built up on the aorta. (See next slide.)
Calcification on the valve
Opening in valve where blood leaks backward
Aortic valve viewed from above
Calcified Aortic Heart Valve
Calcification on the valve
Image courtesy of CDC/ Dr. Edwin P. Ewing, Jr.
Amy’s doctor said,
“Unfortunately you will need another valve replacement to fix your blood flow problem. We have hired a team of bioengineers to design an artificial
valve for you. You won’t be able to play this year, but with any luck, you
should be ready for the volleyball team next season!”
http://commons.wikimedia.org/wiki/Image:Pulmonary_valve_stenosis.svg
Normal heart vs. Pulmonary valve stenosis
Examples of Artificial Valves
http://commons.wikimedia.org/wiki/Image:Starr-Edwards-Mitral-Valve.jpgPhotos courtesy of Rachel Hervey
Final Thoughts
• Two positives of the lesson
• One wish