According to my source found: https://www.medicalnewstoday.com/articles/325530#:~:text=Cardiacmuscletissueormyocardium,pumpingbloodaroundthebody. Cardiac muscle tissue, or myocardium, is a specialized muscle tissue that forms the heart. This muscle tissue, which contracts and releases involuntarily, keeps the heart pumping blood around the body.

Skeletal muscle is one of the three significant muscle tissues in the human body. Each skeletal muscle consists of thousands of muscle fibers wrapped together by connective tissue sheaths. The individual bundles of muscle fibers in a skeletal muscle are known as fasciculi. This is according to: https://www.ncbi.nlm.nih.gov/books/NBK537236/#:~:text=Skeletalmuscleisoneof,muscleareknownasfasciculi.

What is a Mammalian Smooth Muscle Tissue? The muscle tissue in mammals and other higher animals is usually described as either striated, cardiac, or smooth, depending on its function and appearance. The most studied of these types of tissue is a striated muscle, but a significant body of information has been compiled on smooth and cardiac muscles as well.