does bronchioles have muscle tissue?

Yes, bronchioles do have muscle tissue. They are lined with smooth muscle tissue, which helps control the size of the airway. The smooth muscle can contract or relax to change the size of the bronchioles, thereby controlling the amount of air that can pass through. This is particularly important during physical activity, when the body needs more oxygen, and during an asthma attack, when the bronchioles can become constricted.