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the radial fibers contract,enlarging the pupil and allowing more light to enter the eye

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Longitudinally and circularly arranged layers in muscle?

Smooth muscle tissue has longitudinally and circularly arranged layers.


Detrusor muscle what are the 3 layers?

Outer = longitudinal smooth muscle Middle= circular smooth muscle Innermost= longitudinal smooth muscle


What muscle is the heart primarily composed of?

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.


What layers is found in arteries and capillaries?

smooth muscle


Muscle sphincters are composed of what two types of muscle fibers?

Smooth Muscle Fiber


The middle lining of the stomach is composed of this type of muscle tissue?

smooth muscle


What small structures located within the bronchial tree are composed primarily of 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.


What muscles are in the stomach?

The stomach is composed of smooth muscle (as opposed to skeletal or cardiac muscle).


Are the lungs composed of smooth 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.


Does the trachea have skeletal muscle?

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.


Do intestines and bladder have one or more layers of smooth muscle?

yes


What are the three layers of an artery and state their function?

The three layers of an artery are Endothelium, smooth muscle, and connective tissue.