Smooth Muscle
Muscle cells are small, spindle-shaped called fibres with one central nucleus
• The smooth muscles are found in the walls of hollow internal structures,
such as blood vessels, airways, and most organs in the abdominopelvic
cavity.
• No connective tissue coverings.
• These muscles are involuntary and non-striated, has thick (myosin) and
thin (actin) filaments, but no sarcomeres
Muscle cells are usually arranged into sheets of opposing fibres, forming a
longitudinal layer and a circular layer
• Contraction of the opposing layers of muscle causes peristalsis, which
propels substances through the organs.
Muscle cells are small, spindle-shaped called fibres with one central nucleus
• The smooth muscles are found in the walls of hollow internal structures,
such as blood vessels, airways, and most organs in the abdominopelvic
cavity.
• No connective tissue coverings.
• These muscles are involuntary and non-striated, has thick (myosin) and
thin (actin) filaments, but no sarcomeres
Muscle cells are usually arranged into sheets of opposing fibres, forming a
longitudinal layer and a circular layer
• Contraction of the opposing layers of muscle causes peristalsis, which
propels substances through the organs.
