THE FLOW OF BLOOD THROUGH THE HEART

Introduction

INTRODUCTION

The heart is located in the upper left chest cavity. It is about the size of an average fist. Blood flow through the heart is unidirectional. Watch the circulatory song by Mr. W to become familiar with how the blood is pumped through the chambers of the heart. 

Task

TASK

Deoxygenated blood enters the heart via the superior and inferior vena cava. From the superior and inferior vena cava, blood travels into the right atrium. Blood is pumped from the right atrium through the tricuspid valve to the right ventricle. Blood then leaves the right ventricle passing through the pulmonary valve, through the pulmonary artery to the lungs to become oxygenated. Oxygenated blood enters the the heart by way of the pulmonary veins to the left atrium. Blood is pumped from the left atrium through the mitral valve into the left ventricle and out the aortic valve through the aorta to the body.

http://commons.wikimedia.org/wiki/File:Circulation_of_Blood_Through_the…

Process

PROCESS

DAY 1

Working in pairs students will identify the chambers and valves within the heart. Using 8 x 10 paper. (use following picture as a guide)

On the 8 x 10 paper, describe/label each chamber and describe/label all of the valves within the heart. 

file:///Users/marcioliver/Pictures/iPhoto%20Library.photolibrary/Masters/2015/06/02/20150602-212621/blank-human-heart-diagram.png

DAY 2

In pairs,

Part I: On the 8 x 10 paper describe the flow of oxygenated and deoxygenated blood. Part II: Create a pamphlet about cardiovascular disease. Include definition of cardiovascular disease, facts, risk factors, statistics, treatments and recent research. A trifold with color, including all components for a finished product.

Day 3

Work with partner on the following case study. Be sure to research all unfamiliar vocabulary and be ready to explain reasoning as follow up questions are addressed.

CASE STUDY 1

Read through the following clinical vignettes and take time to review each woman's cardiovascular risk factor profile. Then, refer to the questions at the end of the case study to analyze each female patient's current health status.

  • Patient S is a white woman, 43 years of age, and mother of three small children. She has a long-standing history of significant obesity with little success in dieting over the years. At 5'3", she is obese, weighing 220 pounds. Her fat distribution is "apple-shaped" and consequently, her waist-hip ratio is more than the 0.8 normal range. In addition, Patient S lives a fairly sedentary lifestyle and does not have a regular exercise program. Her dietary habits do not take into account basic recommendations for cardiac nutrition.
  • Patient J is 55 years of age and teaches high school English. Her coronary risk factor profile includes a 30-pack-year history of cigarette smoking and altered lipid levels. Her HDL is only 35 mg/dL and her LDL is 145 mg/dL. Patient J has tried with little success to control her cholesterol with diet. Recently, she began taking gemfibrozil as prescribed by her family physician, but has not followed his recommendation to quit smoking and enroll in a smoking cessation program at a local hospital. Rather, she continues to smoke one pack of cigarettes per day.
  • Patient V is a woman, 47 years of age, who has a family history of heart disease. Although she denies ever experiencing cardiac symptoms, her brother suffered a nonfatal MI at 46 years of age and her father had an MI at 53 years of age. Both of these cardiac events were medically managed. However, her father's disease did progress to the point that he underwent CABG surgery five years ago. He had three coronary artery lesions bypassed. In addition to her family history, Patient V is approximately 30 pounds overweight and does not exercise on a regular basis. She drinks approximately two to three glasses of red wine per day and has never smoked.
  • Patient D is 67 years of age and lives in an assisted living retirement community. An insulin-dependent diabetic since adolescence, Patient D is unable to care for herself due to the effects of the diabetes on her eyesight, as well as the development of peripheral neuropathies. In addition to the diabetes, Patient D continues to smoke. By now, she has a 40-pack-year history of smoking.
  • Patient F is an African American woman, 36 years of age, with a history of mild hypertension. Her blood pressure has been fairly well controlled on an ACE inhibitor over the past two years. Patient F eats a well-balanced, nutritious diet, exercises three to five times a week, and does not have a history of smoking or alcohol use. However, she does exhibit many of the characteristics of the Type A behavior pattern, such as excessive competitiveness, being harried, and rushing to complete more and more tasks in an ever-shrinking period of time. In addition to these characteristics, she exhibits a somewhat cynical or negative outlook with occasional expression of hostile or angry thoughts and feelings.

 

In analyzing these clinical scenarios, consider the following questions:

1   Which of these women is at greatest risk for heart disease?

2   Who is at least risk?

What recommendations would you make in counseling each patient regarding her cardiovascular health? 

 

http://www.netce.com/casestudies.php?courseid=1001

Evaluation
Conclusion

CONCLUSION

CONGRATULATIONS!! YOU HAVE FINISHED THE HEART/CARDIOVASCULAR LESSON. AFTER COMPLETING THE PROCESS YOU SHOULD HAVE A GREAT UNDERSTANDING OF BLOOD FLOW THROUGH THE HEART, THE COMPONENTS OF THE HEART AND A BASIC UNDERSTANDING OF CARDIOVASCULAR DISEASE. GOOD JOB!!

Click on the first link that simulates blood flow through the heart. Very detailed information regarding the locations of the chambers within the heart, the valves and the contraction of the heart.

http://www.sumanasinc.com/webcontent/animations/content/humanheart.html

For additional practice:

http://www.montville.net/cms/lib3/NJ01001247/Centricity/Domain/492/Heart%20Blood%20Flow%20Worksheet.docx

Credits
Teacher Page

The flow of blood through the heart lesson is for secondary students that have a basic understanding of high school biology.

Objectives:

The students will be able to identify the heart and all of its components as well as describe blood flow through the heart. Students will also research cardiovascular disease and share facts as well as explain how cardiovascular disease affects lives. 

Michigan Science Standards:

B2.5 Living Organism Composition

All living or once-living organisms are composed of carbohydrates, lipids, proteins, and nucleic acids. Carbohydrates and lipids contain many carbon-hydrogen bonds that also store energy. 

  1. B2.5B  Explain how major systems and processes work together in animals and plants, including relationships

    between organelles, cells, tissues, organs, organ systems, and organisms. Relate these to molecular functions.