Chapter 18- The Cardiovascular System-Heart Assignment - Chapter 18 The Cardiovascular System The Heart For this assignment please read the chapter and

Chapter 18- The Cardiovascular System-Heart Assignment -...

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Chapter 18 – The Cardiovascular System: The Heart For this assignment, please read the chapter and answer the questions below. Please type your answers in red or blue color. Please note that points may be deducted if answers are not submitted in these colors. Cardiovascular System: The cardiovascular system consists of the heart, and vessels, arteries, capillaries and veins. What is the function of this system? Heart: The heart is a hollow, __ cone _____-shaped, muscular pump within the _ thoracic ___________ cavity. The average adult heart is __ 14 _____ cm long and __ 9 _______ cm wide. The heart lies in the __ mediastinum ________________ under the sternum; its apex extends to the _ 5th _______ intercostal space. Pericardium: It is made of a tough outer bag that surrounds a double-layered sac. This tough, outer layer is composed of dense connective tissue and is called the _ fibrous ____________ pericardium. Double-layered sac. The innermost layer of this sac immediately surrounds the heart and is called the _____ visceral _______________ pericardium (also called _ epicardium ______________). At the base of the heart, this inner layer folds back on itself to become the __ parietal ______________ pericardium. Between the layers of this sac is a potential space called the _ pericardial _____________ cavity and it is filled with _ serous ________ fluid. What is the function of this fluid? It helps friction of the muscle movement, or a lubricant. Wall of the Heart The wall of the heart is composed of three distinct layers.The outermost layer, the __

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