the radial fibers contract,enlarging the pupil and allowing more light to enter the eye
Smooth muscle tissue has longitudinally and circularly arranged layers.
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
Smooth Muscle Fiber
smooth muscle
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.
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.
No, the trachea does not have skeletal muscle. Instead, it is composed of smooth muscle, cartilage, and connective tissue. Smooth muscle allows for involuntary control of the trachea's diameter and airflow.
yes
The three layers of an artery are Endothelium, smooth muscle, and connective tissue.