About This Chapter
Human Circulatory System Basics - Chapter Summary
This chapter provides all the basic details you need to know about the human circulatory system. Enjoy lessons designed to ensure you understand the heart, including its anatomy and the functions that make it tick. After exploring this chapter, you will have the knowledge to:
- Describe parts and functions of the human circulatory system
- Discuss the anatomy of the heart, blood flow and parts
- Provide the phases and terms associated with the cardiac cycle
- Share details about heartbeat and heart contraction coordination
- Define and identify wave types of the electrocardiogram
- Identify types of heart conditions and diseases
- Give the definition of arrhythmia of the heart
- Explain heart rate, cardiac output and stroke volume
Expert instructors have prepared brief lessons that keep you engaged as you enhance your understanding of the human circulatory system. If you enjoy reading study materials, be sure to access full lesson transcripts that offer helpful vocabulary words. At any time, feel free to test your knowledge of the lessons by taking self-assessment quizzes. A more comprehensive chapter exam is also available to reinforce lesson concepts.
1. The Human Circulatory System: Parts and Functions
In this lesson, you will take a ride on the transportation system of the body called the circulatory system and its two parts: the pulmonary circuit and the systemic circuit. Take a look inside and see how every inch of your body receives the oxygen and nutrients it needs.
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.
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.
4. 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.
5. Electrocardiogram (ECG): Definition & Wave Types
Do you know how problems in the heart are detected? In this lesson, you will learn how to read an electrocardiogram (ECG) and discover what is happening in the heart during the P, QRS, and T waves.
6. Types of Heart Conditions and Diseases
Your heart muscle receives a rich blood supply from the coronary arteries. If the coronary arteries become blocked, it can result in coronary heart disease, angina, heart attack or congestive heart failure. Learn how these conditions get started.
7. Arrhythmia of the Heart: Terms, Definition & ECG Detection
An electrocardiogram, or ECG, can be used to detect irregular heartbeats or arrhythmias. In this lesson, you will learn about arrhythmias detected by ECG, including bradycardia, tachycardia, fibrillation, and heart block.
8. Heart Rate, Cardiac Output & Stroke Volume
The amount of blood your heart pumps is constantly changing to meet the needs of your body. In this lesson, you will learn how the heart maintains an adequate cardiac output, heart rate and stroke volume.
9. Regulation of Heart Rate and Stroke Volume
The amount of blood being pumped through your body changes constantly due to the demands of daily life. In this lesson, you will learn how your body adjusts the heart rate and stroke volume to increase or decrease blood flow.
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