the radial fibers contract,enlarging the pupil and allowing more light to enter the eye
Smooth muscle tissue has longitudinally and circularly arranged layers.
The muscle layers of the small and large intestines are composed of smooth muscle tissue, which is specialized for involuntary contractions. This smooth muscle is organized into two layers: an inner circular layer and an outer longitudinal layer, facilitating peristalsis and segmentation movements that aid in digestion and absorption.
Outer = longitudinal smooth muscle Middle= circular smooth muscle Innermost= longitudinal smooth muscle
There are three types of muscles in the human body, smooth muscle, cardiac muscle, and skeletal muscle. The Muscle that the heart is made out of is of course, cardiac muscle. The smooth muscle consist of the lining of the esophagus, the stomach and other internal organs, the skeletal muscles consist of more familiar muscle groups such as the hamstrings, quadriceps, biceps, abdominals, etc.
smooth muscle
The intestinal wall is primarily composed of smooth muscle, which is involuntary and non-striated. This smooth muscle is organized into two layers: the inner circular layer and the outer longitudinal layer, which work together to facilitate peristalsis and move food along the digestive tract. Additionally, the intestinal wall contains connective tissue and epithelial cells, contributing to its overall structure and function.
Smooth Muscle Fiber
smooth muscle
The muscle associated with the intestine is primarily the smooth muscle, which is responsible for peristalsis—the rhythmic contraction that moves food through the digestive tract. Additionally, the circular and longitudinal layers of smooth muscle in the intestinal walls facilitate digestion and absorption. In the context of the large intestine, the taeniae coli, a band of smooth muscle, helps in the formation of haustra, or pouches, in the colon.
The stomach is composed of smooth muscle (as opposed to skeletal or cardiac muscle).
No, the lungs are not composed of smooth muscle. They are made up of a spongy tissue called lung parenchyma, which includes air sacs and blood vessels. Smooth muscle is found in the walls of the airways leading to the lungs, called bronchioles.
Bronchioles are smaller tube divisions of bronchi. Walls of bronchioles contain smooth muscle and no cartilage. This helps in contraction and relaxation which allows the flow of air to alveoli.