Smooth muscle is found in all of the following locations except?*Blood vesselsIrisTongueEsophagus

To determine where smooth muscle is not found among the given options—blood vessels, iris, tongue, and esophagus—we need to analyze the function and structure of smooth muscle in each location.

1. Blood Vessels: Smooth muscle is present in the walls of blood vessels, allowing for the regulation of blood flow and pressure.

2. Iris: The iris contains smooth muscle fibers that control the size of the pupil.

3. Tongue: The tongue consists primarily of skeletal muscle, which allows for voluntary movement and control, rather than smooth muscle.

4. Esophagus: The esophagus has both smooth muscle and skeletal muscle. The upper part has skeletal muscle for voluntary control, while the lower part is smooth muscle to facilitate involuntary movement.

Conclusion

The location where smooth muscle is not found is the tongue.