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  1. Large thin-walled vein that opens into the right atrium inferior to the connection with the superior vena cava. Study with Quizlet and memorize flashcards containing terms like Base of the Heart, Apex of the Heart, Coronary Sulcus and more.

  2. Name the layers of the the wall of the heart and surrounding structures from deep to superficial.

  3. The large arterial trunk that carries blood from the heart to be distributed by branch arteries through the body. Study with Quizlet and memorize flashcards containing terms like cardiovascular system, pulmonary circuit, systemic circuit and more.

    • Location of the Heart. The human heart is located within the thoracic cavity, medially between the lungs in the space known as the mediastinum. Figure 19.2 shows the position of the heart within the thoracic cavity.
    • Shape and Size of the Heart. The shape of the heart is similar to a pinecone, rather broad at the superior surface and tapering to the apex (see Figure 19.2).
    • Chambers and Circulation through the Heart. The human heart consists of four chambers: The left side and the right side each have one atrium and one ventricle.
    • Membranes, Surface Features, and Layers. Our exploration of more in-depth heart structures begins by examining the membrane that surrounds the heart, the prominent surface features of the heart, and the layers that form the wall of the heart.
    • Regina Bailey
    • Epicardium. Epicardium (epi-cardium) is the outer layer of the heart wall. It is also known as visceral pericardium as it forms the inner layer of the pericardium.
    • Myocardium. Myocardium (myo-cardium) is the middle layer of the heart wall. It is composed of cardiac muscle fibers, which enable heart contractions. The myocardium is the thickest layer of the heart wall, with its thickness varying in different parts of the heart.
    • Endocardium. Endocardium (endo-cardium) is the thin inner layer of the heart wall. This layer lines the inner heart chambers, covers heart valves, and is continuous with the endothelium of large blood vessels.
  4. Blood flows from the left atrium, through the bicuspid valve, into the left ventricle, into the aortic arch, through the aortic semilunar valve, and then into the systemic arterial system.

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  6. Cardiac Muscle Tissue is found in which layer of the heart? a. Endocardium b. Myocardium c. Epicardium d. Pericardium. Which blood vessels leave the heart and transport blood to the lungs? a. Venae cavae b. Aorta c. Pulmonary arteries d. Pulmonary veins. Of the following, what is the best deûnition of arteries?

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