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BIO304: Human Physiology

Unit 9: The Cardiovascular System   The heart and the circulatory system use blood to deliver oxygen and nutrients to the body cells and to remove carbon dioxide and wastes. The heart acts as a pump contracting hard to squeeze blood to the lungs or to the body cells and does this 24 hours a day 7 days a week. If you have ever felt your heart beating, you have felt the power of this organ. If the heart started to fail, blood would not get to all of the body cells as readily and the cells might die. Waste would increase, because blood might not make it to the kidney to be filtered, and carbon dioxide would build up, because there would be less passes through the lungs. Clearly, the pumping action of the heart is important! In this unit, we will study the processes behind a properly functioning circulatory system and the important interactions with other systems such as the renal and respiratory systems.

Unit 9 Time Advisory
This unit should take approximately 15.25 hours to complete.

☐    Subunit 9.1: 0.5 hours

☐    Subunit 9.2: 7.75 hours

☐    Reading: 4.5 hours
 

☐    Web Media: 0.25 hours

☐    Assessments: 3 hours

☐    Subunit 9.3: 0.75 hour

☐    Subunit 9.4: 1.5 hours

☐    Subunit 9.5: 4.75 hours
 

☐    Reading: 1 hour

☐    Web Media: 1.25 hours

☐    Assessments: 2.5 hours

Unit9 Learning Outcomes
Upon successful completion of this unit, the student will be able to: - identify the different parts of the circulatory system, including the heart, blood vessels, and blood; - describe the structure and function of the heart and the cardiac cycle, including systolic and diastolic cycles; - describe the electrical activity of the heart, cardiac muscle contraction, and ECG; - identify blood vessels and describe the structure and function of arteries, veins, and capillaries; and - identify the composition of the blood; describe the composition and function of the plasma; and identify blood cells and their functions.

9.1 Circulatory Systems and the Heart   - Web Media: YouTube: Khan Academy’s “Circulatory System and the Heart” Link: YouTube: Khan Academy’s “Circulatory System and the Heart” (YouTube)

 Instructions: Click on the link above and watch this lecture for an
introduction to the circulatory system and the heart.  

 Watching this video and pausing to take notes should take
approximately 30 minutes.  

 Terms of Use: This video is licensed under a [Creative Commons
Attribution-NonCommercial-NoDerives United States License 3.0](). It
is attributed to the Khan Academy. 

9.2 The Heart   - Reading: Wikibooks’ Human Physiology: “Cardiac Cycle” and “Blood Pressure” Link: Wikibooks’ Human Physiology: “Cardiac Cycle” (HTML) and “Blood Pressure” (HTML)

 Instructions: Read the sections titled “Cardiac Cycle” and “Blood
Pressure” to learn about the contraction and relaxation cycle of the
heart as well as the blood pressure.  

 Reading these sections should take approximately 30 minutes.  

 Terms of Use: Please respect the copyright and terms of use
displayed on the webpage above.
  • Web Media: YouTube: Michael Maxin’s “Heart Anatomy” Link: YouTube: Michael Maxin’s “Heart Anatomy” (YouTube)

    Instructions: Click on the link above and watch this brief video to review the anatomy of the heart.

    Watching this video and pausing to take notes should take approximately 15 minutes.

    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • Reading: Wikibooks’ Human Physiology: “The Cardiovascular System” and “Cardiac Muscle” Link: Wikibooks’ Human Physiology: “The Cardiovascular System” (HTML) and “Cardiac Muscle” (HTML)

    Instructions: Click on the links above and read these webpages in their entirety to learn about the cardiovascular system’s structure. The heart acts as a pump to move the blood throughout the body. Without the heart, the body’s cells could not get oxygen and nutrients as well as could not have carbon dioxide and wastes removed.

    Reading these webpages should take approximately 3 hours.

    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • Reading: Wikibooks’ Human Physiology: “The Heart’s Electrical Conduction System” and “The ECG” through “Cardiac Muscle Contraction” Link: Wikibooks’ Human Physiology: “The Heart’s Electrical Conduction System” (HTML) and “The ECG” (HTML) through “Cardiac Muscle Contraction” (HTML)

    Instructions: Read the entire section titled “The Heart’s Electrical Conduction System,” and read the section “The ECG” only through “Cardiac Muscle Contraction” to learn the specific mechanics of the heartbeat and how it is controlled by electrochemical impulses. The section entitled “The ECG” explains how these electrical activities are measured.

    Reading these sections should take approximately 1 hour.

    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • Assessment: McGraw-Hill Online Learning Center: Seeley, Stephens, & Tate’s “Cardiovascular System: The Heart – Clinical Application One” and “Cardiovascular System: The Heart – Clinical Application Two” Link: McGraw-Hill Online Learning Center: Seeley, Stephens, & Tate’s “Cardiovascular System: The Heart – Clinical Application One” (HTML) and “Cardiovascular System: The Heart – Clinical Application Two” (HTML)

    Instructions: Click on the links above, read the examples, and respond to the questions that follow after working through the materials in this subunit. Click the “Submit Answers” button at the bottom of each webpage for instant feedback.

    Completing these assessments should take approximately 2 hours.

    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • Assessment: McGraw-Hill Online Learning Center: Seeley, Stephens, & Tate’s “Cardiovascular System: The Heart – Chapter Quiz” Link: McGraw-Hill Online Learning Center: Seeley, Stephens, & Tate’s “Cardiovascular System: The Heart – Chapter Quiz” (HTML)

    Instructions: Complete the above quiz after completing this section. Click the “Submit Answers” button for instant grading and feedback.

    Completing this assessment should take approximately 1 hour.

    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

9.3 Blood Vessels   - Reading: Wikibooks’ Human Physiology: “The Circulatory System” and “Cardiovascular Pathways” Link: Wikibooks’ Human Physiology: “The Circulatory System” (HTML) and “Cardiovascular Pathways” (HTML)

 Instructions: Read the sections titled “The Circulatory System” and
“Cardiovascular Pathways” to learn about the circulatory mechanism’s
functional parts and how each contributes to blood flow.  

 Reading these sections should take approximately 45 minutes.  

 Terms of Use: Please respect the copyright and terms of use
displayed on the webpage above.

9.4 Cardiovascular Diseases   - Assessment: McGraw-Hill Online Learning Center: Seeley, Stephens, & Tate’s “Cardiovascular System: Peripheral Circulation and Regulation – Labeling Exercises” Link: McGraw-Hill Online Learning Center: Seeley, Stephens, & Tate’s “Cardiovascular System: Peripheral Circulation and Regulation – Labeling Exercises” (HTML)

 Instructions: Click on the links for the adrenal medullary
mechanism and the renin-angiotensin-aldosterone mechanism, and
complete these exercises. These assessments emphasize the influence
of various body systems on how the cardiovascular system
functions.  

 Completing this assessment should take approximately 1 hour.  

 Terms of Use: Please respect the copyright and terms of use
displayed on the webpage above.
  • Reading: Wikibooks’ Human Physiology: “Cardiovascular Disease” Link: Wikibooks’ Human Physiology: “Cardiovascular Disease” (HTML)

    Instructions: Read the section titled “Cardiovascular Disease” to learn about the different types of cardiovascular disease and how they affect the operation of the circulatory system.

    Reading this section should take approximately 30 minutes.

    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

9.5 Blood   - Web Media: YouTube: Khan Academy’s “Hemoglobin” Link: YouTube: Khan Academy’s “Hemoglobin” (YouTube)

 Instructions: Click on the link above and watch this lecture for an
introduction to hemoglobin.  

 Watching this video and pausing to take notes should take
approximately 30 minutes.  

 Terms of Use: This video is licensed under a [Creative Commons
Attribution-NonCommercial-NoDerives United States License 3.0](). It
is attributed to the Khan Academy. 
  • Web Media: YouTube: Khan Academy’s “Red Blood Cells” Link: YouTube: Khan Academy’s “Red Blood Cells” (YouTube)

    Instructions: Click on the link above and watch this lecture for an introduction to red blood cells.

    Watching this lecture and pausing to take notes should take approximately 30 minutes.

    Terms of Use: This video is licensed under a Creative Commons Attribution-NonCommercial-NoDerives United States License 3.0. It is attributed to the Khan Academy. 

  • Reading: Wikibooks’ Human Physiology: “Blood Physiology: Overview” Link: Wikibooks’ Human Physiology: “Blood Physiology: Overview” (HTML)

    Instructions: Click on the link above and read this webpage on the physiology of blood through the section titled “Hemostasis.” This webpage will also identify and discuss the diseases that can impact the effectiveness of blood function.

    Reading this webpage should take approximately 1 hour.

    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • Web Media: YouTube: American Society of Hematology’s “Components of Blood and Their Importance” and Gene Ed’s “Hemostasis” Link: YouTube: American Society of Hematology’s “Components of Blood and Their Importance” (YouTube) and Gene Ed’s “Hemostasis” (YouTube)

    Instructions: Click on the links above and watch thesee videos to learn about the plasma, blood cells, and the process of hemostasis.

    Watching these videos and pausing to take notes should take approximately 10 minutes.

    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • Web Media: YouTube: American Society of Hematology’s “Sickle Cell Anemia” and “Spherocytosis” Link: YouTube: American Society of Hematology’s “Sickle Cell Anemia” (YouTube) and “Spherocytosis” (YouTube)

    Instructions: Click on the links above and watch these videos, which discuss two blood diseases and how they impact physiology.

    Watching these videos and pausing to take notes should take approximately 10 minutes.

    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • Assessment: McGraw-Hill Online Learning Center: Seeley, Stephens, & Tate’s “Cardiovascular System: The Blood – Clinical Application” Link: McGraw-Hill Online Learning Center: Seeley, Stephens, & Tate’s “Cardiovascular System: The Blood – Clinical Application” (HTML)

    Instructions: This assessment is for Unit 9. Read this example of a clinical application of knowledge of blood physiology, and respond to the questions that follow. Click the “Submit Answers” button at the bottom of the page for instant feedback.

    Completing this assessment should take approximately 30 minutes.

    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.

  • Assessment: McGraw Hill Online Learning Center: Stuart Ira Fox’s “Heart and Circulation Quiz: Multiple Choice 1”, “Heart and Circulation Quiz: Multiple Choice 2”, “Cardiac Output Quiz: Multiple Choice 2”, and “Cardiac Output Quiz: Critical Thinking Exercises” Link: McGraw Hill Online Learning Center: Stuart Ira Fox’s “Heart and Circulation Quiz: Multiple Choice 1” (HTML), “Heart and Circulation Quiz: Multiple Choice 2” (HTML), “Cardiac Output Quiz: Multiple Choice 2” (HTML), and “Cardiac Output Quiz: Critical Thinking Exercises” (HTML)

    Instructions: Click on the links above and complete the quizzes to demonstrate your understanding of the circulatory system. For the critical thinking questions, take a second after reading each question to think about how the concepts you have just learned apply and formulate a short, thoughtful answer. Click the “Submit Answers” button for instant feedback.

    Completing these assessments should take approximately 2 hours.

    Terms of Use: Please respect the copyright and terms of use displayed on the webpage above.