About This Chapter
Cardiovascular System - Chapter Summary and Learning Objectives
Heart disease is prevalent in our society today. There are many forms of heart disease and many problems that can affect your heart and circulatory system. Heart trouble can cause a range of other health issues, too. Without this powerful muscle and all its components working properly, a person cannot live a full life. In this chapter, we will focus on studying the cardiovascular system, including an in-depth look at the heart. You'll see how this system works and how it might fail. Some of the things you'll get to study in these lessons include:
- The phases of the cardiac cycle
- What happens when the heart beats
- Types of heart conditions
- How blood flow in the heart is regulated
- What's important about the red blood cells
|The Human Circulatory System: Parts and Functions||Study the parts and functions of the circulatory systems, including closed circulatory, double circulation, pulmonary circuit, systemic circuit, heart, blood vessels and blood.|
|Anatomy of the Heart: Blood Flow and Parts||Take an in-depth look at the heart and learn about the atrium, ventricle, mitral valve, tricuspid valve, semilunar valves, aorta, vena cava pulmonary arteries and pulmonary veins.|
|The Cardiac Cycle: Phases, Explanation & Terms||Explore the cardiac cycle.|
|Heartbeat and Heart Contraction Coordination||Examine how the heart works.|
|Electrocardiogram (ECG): Definition & Wave Types||Discover what an ECG is.|
|Arrhythmia of the Heart: Terms, Definition & ECG Detection||Analyze arrhythmia of the heart, including bradycardia, tachycardia, flutter, fibrillation and heart block.|
|Types of Heart Conditions and Diseases||Look at common types of heart conditions, such as heart attack, coronary heart disease and congestive heart failure.|
|Heart Rate and Blood Flow Regulation||Examine stroke volume, flow rate, vascular resistance, end-diastolic volume and end-systolic volume.|
|Regulation of Blood Pressure: Short Term Regulation & Baroreceptors||Find out more about how blood pressure is regulated.|
|Functions of the Lymphatic System||Discover how the lymphatic system functions.|
|Circulatory System: Red Blood Cells||Explore the role of red blood cells and learn about anemia, hemoglobin and reticulocyte.|
|Circulatory System: Hemoglobin||Analyze what hemoglobin is and its importance.|
|Oxygen-Hemoglobin Dissociation Curve||Study the oxygen-hemoglobin dissociation curve.|
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. 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.
6. 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.
7. 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.
8. Total Peripheral Resistance & Blood Flow Regulation
Blood flows continually through your heart and blood vessels. As the needs of the body change, blood flow needs to increase or decrease. Learn how vasodilation, vasoconstriction and other factors change the amount of resistance within your blood vessels to change blood flow through your body.
9. Regulation of Blood Pressure: Short Term Regulation & Baroreceptors
Blood pressure in your blood vessels is closely monitored by baroreceptors; they send messages to the cardio regulatory center of your medulla oblongata to regulate your blood pressure minute-by-minute. In this lesson, you will learn how baroreceptors regulate your short-term blood pressure.
10. 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.
11. Circulatory System IV: Red Blood Cells
Why don't mature red blood cells have nuclei or mitochondria, and how do these guys squeeze through capillaries? While learning about the brief but glorious lives of red blood cells, you'll also see which characteristics help them transport oxygen and carbon dioxide to other cells.
12. Circulatory System V: Hemoglobin
Did you ever wonder how red blood cells can store enough oxygen to supply the entire human body? Join us in this lesson on hemoglobin to learn why red blood cells are so good at transporting oxygen and carbon dioxide. This lesson will make you see red (as well as blue and purple-maroon)!
13. 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.
14. Rh Blood Group, Rh Factor & Erythroblastosis Fetalis
Rh factor is a red blood cell antigen found in most people. Those with Rh factor are Rh positive, while those without are Rh negative. In this lesson you will learn about Rh blood compatibility and its importance during pregnancy.
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Other chapters within the Biology 105: Anatomy & Physiology course
- Overview of Anatomy and Cell Biology
- Human Respiratory System
- Blood Vessels
- Digestive System
- Urinary System
- The Endocrine System
- The Brain
- The Nervous System at the Cellular Level
- The Five Senses
- Muscle Physiology
- Gross Anatomy of Muscular System
- Connective Tissue
- Skeletal System
- Male and Female Reproductive Systems
- Studying for Biology 105