I think you might be thinking of the esophagus.
A follicle is the tubelike structure from which hair grows.
Esophagus
Smooth Muscles line the walls of tubelike structure such as the gastrointestinal tract, the urinary system, the blood vessels and the bronchi of the lungs.
The space within a tube-like structure is called a lumen. Parts of the body with lumens include veins and arteries.
Ureter. The urethra connects the bladder to the outside world.
The tubelike structure that contains the root of the hair is called the hair follicle. The hair follicle is located in the dermis of the skin and plays a vital role in hair growth and regeneration.
tubular
tubelike streucture
A tubelike structure of neurons is typically referred to as a nerve or a nerve fiber, which is part of the peripheral nervous system. These structures consist of long, elongated neurons that transmit electrical signals, facilitating communication between the brain, spinal cord, and various parts of the body. In a broader context, this could also refer to the spinal cord itself, where bundled neurons run in a tubular arrangement, serving as the main pathway for information traveling between the brain and the body.
Hair Follicle
proboscis
vascular plants