CHAPTER 37 – THE CIRCULATORY AND RESPIRATORY SYSTEMS

muscle tissue . that forms the four chambers of the heart. Cardiac muscle cells are striated. and interconnected to produce strong, powerful contractions. c. Endocardium – Innermost . membrane that lines the chambers, covers the valves, and continues into the vessels. Composed of smooth, epithelial tissue. to prevent blood clotting. 2 ... ................
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