circular muscle
batuta
A circular muscle cell is a type of muscle cell that is oriented in a circular or transverse direction around a structure. These cells are responsible for contracting and relaxing to control the size of lumens within hollow organs like the intestines or blood vessels.
Diaphragm
Outer = longitudinal smooth muscle Middle= circular smooth muscle Innermost= longitudinal smooth muscle
The Ciliary Muscle is a circular ring of smooth muscle attached to the lens of the suspensory ligaments.
between the circular and longitudinal muscle layers
Another name for the circular muscle surrounding the mouth is the orbicularis oris. This muscle is responsible for various functions, including closing and puckering the lips, as well as controlling movements involved in speech and facial expressions.
In nematodes, circular muscle is absent. Nematodes possess only longitudinal muscle, which allows for their characteristic thrashing movement. This adaptation is part of their unique body structure, enabling them to navigate through their environments effectively.
It's the heart
The main muscle in the bladder is called the Detrusor muscle (which is a smooth muscle). it is circular.
Circular and Radius set of muscle fibers