About This Chapter
The Circulatory System, Blood & Blood Vessels - Chapter Summary
Trace the flow of blood to and from the heart, identify and locate the primary blood vessels and explore the components of blood as you work through these lessons. You will study the types of blood vessels, their functions, the layers of tissue that comprise them and other related facts.
In addition to the types and structure of veins, arteries and capillaries, you will also study diseases of the blood such as anemia, the factors that cause it to clot, and the cause for the condition known as 'blue baby.' The following information is included in these lessons:
- Regulation of blood flow and blood pressure
- Role of lymph nodes and the lymphatic system
- Blood components including hemoglobin and red blood cells
- Rh factors and blood types
- Causes and types of anemia, how blood clots, and the role of coagulation in healing wounds
- Types of blood vessels and their composite layers
- Pulmonary, cardiac and somatic blood vessels
This powerful, comprehensive study guide is designed to help you study efficiently, effectively and enjoyably. The lessons are short, well-written and illustrated, and are presented by acknowledged experts. The convenient online platform allows you to arrange your study sessions around your personal schedule, and our subject-matter specialists are available via email to answer any questions you may have.
1. 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.
2. 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.
3. 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.
4. 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.
5. 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)!
6. 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.
7. 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.
8. Anemia: Types and Causes
Your red blood cells have a unique design that differentiates them from all other cells. This unique design makes them exceptional oxygen carriers. But if this ability to carry oxygen is compromised, the result is a form of anemia, such as pernicious anemia, aplastic anemia or sickle cell anemia.
9. 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.
10. Blood Vessels: Arteries, Capillaries & More
In this lesson, you will take a trip around the circulatory system and encounter the various blood vessels, including arteries, veins, and capillaries. Come along as we follow the path to every cell of your body.
11. 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.
12. Major Blood Vessels Between the Heart and Lungs: Pulmonary Trunk, Arteries & Veins
In this lesson you will learn about the main blood vessels that travel between the heart and lungs. You will also discover that these arteries and veins follow a somewhat unusual pattern.
13. Major Blood Vessels That Carry Blood Away From the Heart
Do you know which arteries are typically blocked during a heart attack? In this lesson, you will learn about the major blood vessels that feed the heart, brain and upper body. Then, find out what causes the pain known as angina.
14. Major Blood Vessels: Descending Aorta - Thoracic and Abdominal Aorta
The aorta is the largest artery of your body, and it is a strong and sturdy vessel. In this lesson, you will learn about its downward path through the chest and abdomen and discover the organs and structures supplied by its branches.
15. Major Blood Vessels Leading to the Heart: Superior Vena Cava, Inferior Vena Cava & Coronary Sinus
In this lesson, you will learn about the main blood vessel that returns blood to the heart called the Venae Cavae. You'll also learn about its two sections: the Superior and Inferior Vena Cava. You will then discover the special drainage system for the heart called the Coronary Sinus.
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