Answer:
smooth muscle
Explanation:
Smooth muscles are found on the walls of alimentary canal, blood vessels and tubular visceral organs e.g., urino-genital system and respiratory tract. The cells that make up the smooth muscles are spindle-shaped each with a single nucleus that is centrally located.
They contain myofibrils enclosed by a plasma membrane. They are capable of slow involuntary contractions. Observed under the microscope, the cells lack cross striations hence referred to as unstriated muscle. They contract and fatigue slowly.
