What type of tissue is the heart primarily composed of?

The heart is primarily composed of muscular tissue, specifically cardiac muscle tissue. Cardiac muscle is unique to the heart and is responsible for its ability to contract and pump blood throughout the body. This tissue is striated and involuntary, meaning it functions automatically without conscious control, allowing the heart to maintain a consistent rhythm and pumping action essential for circulation.

The heart also contains other types of tissue, including connective tissue, which provides structural support, and epithelial tissue, which lines the chambers and valves of the heart. However, the primary function of the heart relies on its muscular tissue, making it the most significant component in terms of its primary role in pumping blood and sustaining life through circulation.