Muscle 1.1

3. A thin protein strand inside a muscle cell. The main types, actin and myosin, work together to make the muscle contract.
6. A strong, cordlike band of connective tissue that usually attaches a muscle to a bone.
9. A single muscle cell. Skeletal muscle fibers are long and contain many nuclei.
11. Muscle tissue found in the walls of organs and blood vessels. It works automatically to move materials through the body and control the width of passageways.
14. A layer of connective tissue that surrounds a bundle of muscle fibers called a fascicle.
15. A word part meaning flesh. In muscle terms, it often refers to parts of a muscle cell.
17. Working without conscious control, such as your heart beating or your intestines moving food.
18. A thin layer of connective tissue that surrounds each individual muscle fiber.

1. Under conscious control, such as choosing to raise your hand.
2. Muscle tissue found only in the heart. It contracts automatically to pump blood.
4. The cytoplasm of a muscle cell—the material inside the cell that surrounds its internal structures.
5. A broad, flat sheet of connective tissue that attaches a muscle to a bone, another muscle, or other connective tissue.
7. A bundle of muscle fibers grouped together inside a muscle.
8. Special connections between cardiac muscle cells that hold the cells together and help electrical signals pass between them so the heart contracts in a coordinated way.
10. Muscle tissue that usually attaches to bones and moves the skeleton. Most skeletal muscle movements are under your conscious control.
12. Word parts meaning muscle.
13. A layer of connective tissue that surrounds an entire skeletal muscle.
16. Alternating light and dark bands visible in skeletal and cardiac muscle under a microscope. They result from the organized arrangement of proteins inside the cells.