Ch 26: Basics of the Circulatory System

About This Chapter

Improve your understanding of the cardiac cycle, heart contradiction coordination, blood coagulation, and more. If you are preparing for an exam or class discussion, these lessons and quizzes will help you feel more confident by testing your knowledge of the circulatory system in advance.

Basics of the Circulatory System - Chapter Summary

In these lessons on the circulatory system, you will review how cardiac output is calculated, what blood types mean, and how blood travels through the body. You will come to better understand disorders of the circulatory system and the functions of a double circulatory system. By the end of the chapter, you should feel confident and prepared to:

  • Explain what open and closed circulatory systems have in common
  • Recognize chambers and one-way valves in the heart
  • Discuss what happens during each cardiac cycle
  • Define systole and diastole
  • Recall how the heart's regulatory system works
  • List the three layers that make up blood vessels
  • Discuss events in your body that promote blood clotting
  • Explain functions of the lymphatic system

These self-paced lessons will help you quickly get up to speed on the basics of the circulatory system. A brief quiz is available for each lesson to test your knowledge on concepts covered. In addition, full transcripts are available for every lesson.

14 Lessons in Chapter 26: Basics of the Circulatory System
Test your knowledge with a 30-question chapter practice test
Compare & Contrast Open & Closed Circulatory Systems

1. Compare & Contrast Open & Closed Circulatory Systems

In this lesson, you will explore open and closed circulatory systems. You will also learn what these two systems have in common and what makes them different.

Anatomy of the Heart: Blood Flow and Parts

2. Anatomy of the Heart: Blood Flow and Parts

In this lesson, you will take a look inside the heart and identify the chambers and one-way valves that make up this vital organ. You will also follow along as we trace the flow of blood through the heart chambers.

The Cardiac Cycle: Phases, Explanation & Terms

3. The Cardiac Cycle: Phases, Explanation & Terms

In this lesson, you will learn what happens during each heartbeat, or cardiac cycle. You will also learn that the heartbeat involves periods of relaxation and contraction, known as diastole and systole, respectively.

Systole: Definition & Measurement

4. Systole: Definition & Measurement

This lesson defines what the term systole means and how it occurs in the body. We will take a brief look at the function of the heart in order to fully understand what is happening during systole. After reading the lesson, there is a short quiz to check your knowledge.

Diastole: Definition & Importance

5. Diastole: Definition & Importance

We are going to discuss what diastole means and when it occurs. You will learn about the importance of diastole. There will be a quiz to check your understanding after the lesson.

Double Circulation: Definition & Advantage

6. Double Circulation: Definition & Advantage

Humans and many other organisms use a double circulatory system. This means that we have two separate circuits for blood in our body. Learn how these circuits differ and the function of each one.

Heartbeat and Heart Contraction Coordination

7. Heartbeat and Heart Contraction Coordination

In this lesson you will learn about your heart's very own regulatory system, the intrinsic conduction system, and how it sets the pace for a normal, healthy heartbeat. You will discover that your heart moves to its own beat thanks to the natural pacemaker of the heart called the SA node.

Cardiac Output: Definition, Formula, Calculation & Normal Range

8. Cardiac Output: Definition, Formula, Calculation & Normal Range

Medical professionals need to be able to quantify how efficient your heart works, which involves understanding cardiac output. This lesson will look at what cardiac output is, how it is calculated and why it is important.

How Blood Travels Throughout the Body

9. How Blood Travels Throughout the Body

This lesson is going to cover the different blood vessels that carry blood throughout the body. The route and changes in blood pressure will also be discussed. A short quiz will follow.

Blood Vessel Layers: Tunica Intima, Tunica Media & Tunica Adventitia

10. Blood Vessel Layers: Tunica Intima, Tunica Media & Tunica Adventitia

In this lesson, you will take a microscopic look at the three layers, or tunics, that make up your blood vessels. Follow along and learn how the different cells within these tunics help the vessels contract and relax as blood moves through your circulatory system.

Blood Types: ABO System, Red Blood Cell Antigens & Blood Groups

11. Blood Types: ABO System, Red Blood Cell Antigens & Blood Groups

You are either blood type A, B, AB or O. But, did you know that your blood type is determined by microscopic antigens found on your red blood cells? In this lesson, you will learn about the different blood groups and why they do not mix.

Blood Coagulation and Wound Healing

12. Blood Coagulation and Wound Healing

When your blood vessels suffer damage, your body follows a sequence of events to promote blood clotting. In this lesson, you will learn about coagulation cascade and important clotting factors involved in wound healing.

Functions of the Lymphatic System

13. Functions of the Lymphatic System

In this lesson, you will learn about the lymphatic system and the vital role it plays in keeping the cardiovascular system working. You'll discover how the lymphatic system (with its lymphatic vessels and capillaries) quietly works in the background to return leaked fluids back to the blood.

Major Disorders of the Circulatory System

14. Major Disorders of the Circulatory System

In this lesson we'll first review what the circulatory system is. Then we'll explore three major types of disorders in the circulatory system: heart attack, stroke, and atherosclerosis.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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