where is the nervous tissue found in respiratory tract?

The nervous tissue in the respiratory tract is primarily found in the form of nerve fibers and nerve endings. These are distributed throughout the respiratory tract, including the nasal cavity, pharynx, larynx, trachea, bronchi, and lungs.

1. Nasal Cavity: The olfactory nerves, responsible for the sense of smell, are found in the upper part of the nasal cavity.

2. Pharynx and Larynx: The glossopharyngeal nerve (9th cranial nerve) and the vagus nerve (10th cranial nerve) supply the pharynx and larynx. These nerves help in swallowing and vocalization.

3. Trachea and Bronchi: The vagus nerve also supplies the trachea and bronchi. It carries sensory information about the state of the respiratory tract to the brain and also carries motor commands from the brain to the muscles of the respiratory tract.

4. Lungs: The pulmonary plexus, a network of nerves consisting of both sympathetic and parasympathetic fibers, innervates the lungs. These nerves control the constriction and dilation of the airways as well as the secretion of mucus in the lungs.

In summary, nervous tissue is found throughout the respiratory tract and plays a crucial role in its functioning.