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.
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.
I think you might be thinking of the esophagus.
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.
Afferent neurons
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.
Structure Unipolar Bipolar Multipolar AND FUNCTION sensory or afferent neurons Motor or efferent neurons
Neurons are classified by their structure and function. Structurally, neurons can be categorized as sensory neurons, motor neurons, or interneurons. Functionally, neurons can be classified as excitatory or inhibitory based on the type of signals they transmit.
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Dendrites