Which tissue forms the walls of the heart?

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Study for the ELANCO Advanced Animal Science Exam. Enhance your knowledge with flashcards and multiple choice questions, with hints and explanations for each question. Get ready for your exam!

Multiple Choice

Which tissue forms the walls of the heart?

Explanation:
Cardiac muscle tissue forms the walls of the heart. It makes up the myocardium, the thick muscular layer that contracts to pump blood with every heartbeat. This tissue is specialized for involuntary, rhythmic contraction and is connected by intercalated discs with gap junctions, which coordinate the heart’s beating. While skeletal muscle is voluntary and found in limbs, and smooth muscle lines many hollow organs and vessels, nervous tissue handles signaling rather than forming muscular walls. So the heart’s walls are composed of cardiac muscle tissue.

Cardiac muscle tissue forms the walls of the heart. It makes up the myocardium, the thick muscular layer that contracts to pump blood with every heartbeat. This tissue is specialized for involuntary, rhythmic contraction and is connected by intercalated discs with gap junctions, which coordinate the heart’s beating. While skeletal muscle is voluntary and found in limbs, and smooth muscle lines many hollow organs and vessels, nervous tissue handles signaling rather than forming muscular walls. So the heart’s walls are composed of cardiac muscle tissue.

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