Why Is Smooth Muscle Spindle Shaped?

The spindle shape of the mononucleated smooth muscle cell permits a close contact among cells in the splanchnic and vascular walls. ... The space between the different macular connexons is about 2 nm, which allows low-molecular compounds to pass from one cell to another.

What are smooth muscles shaped like?

Smooth muscle cells are spindle shaped, have a single, centrally located nucleus, and lack striations. They are called involuntary muscles.

Why are smooth muscles not striated?

At a cellular level, smooth muscle functions as an involuntary non-striated muscle. Smooth muscle contains thick and thin filaments that do not arrange into sarcomeres, resulting in a non-striated pattern. ... Smooth muscle cytoplasm contains large amounts of actin and myosin.