Question

Explain the structure of muscle fiber seen in walls of visceral organs

Answer 1

• The visceral organs are made up of smooth muscle or unstriated muscles which are present in the walls of hollow organs like the urinary bladder, uterus, stomach, intestines etc.
• Smooth muscle cells have a single nucleus and are spindle-shaped.
• Its sarcoplasm consists of actin and myosin along with dense bodies in the sarcolemma which anchor the thin filaments.
• A network of intermediate filaments is present in them that pulls the sarcolemma toward the fibers i.e it helps in contraction.