The main muscle in the bladder is called the Detrusor muscle (which is a smooth muscle). it is circular.
No, smooth muscle is poorly organized and do not have the Z lines which are characteristic of sarcomeres.
smooth muscle
thick and thin bands (lines) of filaments.
Smooth muscle (involuntary)lines ducts and vessels.
The lines that extend the staff are called ledger lines.
Botox actually paralyzes the muscle that it is injected into. If you ask the person to smile, they will not be able to use that muscle. Great care has to be taken as this is the deadliest toxin known.
It is called cardiac muscle, or myocardium.
strap Muscle
It is called involuntary muscle or smooth muscle.
Your heart is a muscle. It is also called the myocardium. The muscle cells in the heart muscle are called myocardiocytes.
A single muscle cell is called a muscle fiber.